| Table of Contents | |
| Possible Causes of P0446 & Their Repair Costs | A P0446 code indicates a problem with a vehicle’s EVAP system vent control circuit, which manages fuel vapor flow between the charcoal canister and engine. |
| How to Diagnose The Cause of Your P0446 Code | A P0446 code is typically triggered by a misaligned or defective gas cap, damaged fuel filler neck, faulty charcoal canister vent control valve, cracked EVAP lines, malfunctioning fuel tank pressure sensor, failing charcoal canister, damaged fuel tank, or a defective engine control module (ECM)/powertrain control module (PCM). |
| Can I drive with a P0446 code? | Yes, driving for a few weeks is usually okay. Extended repair delays can reduce fuel economy, increase emissions, and elevate the risk of more expensive repairs. |
| DIY | How To Fix P0446 Causes | DIYable P0446 triggers include:Damaged or Defective Gas CapFaulty EVAP lineOther DIY Considerations for Code P0446 |
| P0446 Code FAQs | Frequently asked questions:What makes and models does code P0446 affect the most?What are typical code P0446 symptoms?Are P0446 Chevy codes common? |
Vehicle emissions involve more than what comes out of the tailpipe. Gasoline evaporates into the atmosphere, releasing harmful hydrocarbons to what we breathe. To control these vapors, modern automobiles have an evaporative emission control (EVAP) system, which, like every system, can have its share of problems and resulting diagnostic trouble codes (DTCs).
This article focuses on P0446—Evaporative Emission Control System Vent Control Circuit Malfunction (EVAP System Vent Control Circuit Malfunction). P0446 indicates a problem with the EVAP system’s vent control circuit, which helps manage fuel vapor flow between the charcoal canister and the engine. These gases are periodically sent into the combustion chamber rather than released into the atmosphere.
A P0446 code typically occurs when the engine control module (ECM) or powertrain control module (PCM) detects a short circuit in the vent control valve’s electrical system or a leak in the EVAP system. This DTC may appear by itself or with adjacent codes. P0446 is part of a family of EVAP system-related trouble codes that include:
- P0440: EVAP System Malfunction (General)
- P0441: EVAP System Incorrect Purge Flow
- P0442: EVAP System Small Leak Detected
- P0443: EVAP System Purge Control Valve Circuit
- P0444: EVAP System Purge Control Valve Circuit Open
- P0445: EVAP System Purge Control Valve Circuit Shorted
- P0447: EVAP System Vent Control Circuit Open
- P0448: EVAP System Vent Control Circuit Shorted
- P0449: EVAP System Vent Valve/Solenoid Circuit Malfunction
- P0450: EVAP System Pressure Sensor Malfunction
- P0451: EVAP System Pressure Sensor Range/Performance
- P0452: EVAP System Pressure Sensor Low Input
- P0453: EVAP System Pressure Sensor High Input
- P0454: EVAP System Pressure Sensor Intermittent
- P0455: EVAP System Large Leak Detected
- P0456: EVAP System Very Small Leak Detected
- P0457: EVAP System Leak Detected (Fuel Cap Loose/Off)
- P0458: EVAP System Purge Control Valve Circuit Low
- P0459: EVAP System Purge Control Valve Circuit High
While DTCs are never welcome, at least P0446 is low on the severity level. This doesn’t mean you can ignore the problem, but waiting a few weeks to tackle repairs is acceptable. However, if one critical symptom is present, gas fumes, you’ll want to address the issue immediately, as these are combustible vapors.
While the EVAP system’s purpose is simple, the system itself is not. This complexity creates many possible triggers for a P0446 code, ranging from a loose gas cap to a defective engine control module. We’ll review these common causes, look at the associated repairs, and dive into what vehicles are most likely to face these troubles.
Possible Causes of P0446 & Their Repair Costs
Whether you’re handling P0446-related repairs on your own or heading to a mechanic, recognizing the potential costs for this work is a smart approach to car ownership.
Check out the FIXD article on the most common causes of check engine lights.
Here’s an overview of the most likely parts and systems that can cause a P0446 code and their average repair costs. Actual prices can depend on the vehicle and location.
P0446 Code Triggers & Typical Repair Costs
| Part To Repair | Part / DIY Price | Mechanic Total Cost |
| Replacement gas cap | $20–$60 | N/A |
| Fuel Tank Filler Neck | $60–$310 | $270–$580 |
| Charcoal Canister Vent Control Valve | $50–$65 | $126–$141 |
| Replacement EVAP Line | $30–$70 | $106–$146 |
| Fuel Tank Pressure Sensor | $127–$129 | $264–$304 |
| Charcoal Canister | $362–$391 | $453–$507 |
| Fuel Tank | $1,224–$1,265 | $1,488–$1,598 |
| Engine Control Module (ECM)/Powertrain Control Module (PCM) | $929–$978 | $1,006–$1,075 |
Here’s a brief look at how faulty parts trigger a P0446 code.
Parts Most Likely to Fail & Cause a P0446 Code
| Parts that can cause P0446 | How it could cause P0446 |
| Gas Cap | When cracked, damaged, or improperly tightened, it breaks the sealed vacuum system and allows fuel vapors to escape. |
| Fuel Tank Filler Neck | Dents, cracks, or corrosion in this tube can prevent a proper seal between the gas cap and the fuel tank. |
| Charcoal Canister Vent Control Valve | If stuck, shorted, or malfunctioning, it can’t properly control the flow of fuel vapors between the canister and the atmosphere. |
| EVAP Line | Cracked, disconnected, or damaged vapor lines create leaks that disrupt the sealed system. |
| Fuel Tank Pressure Sensor | When faulty, it sends incorrect pressure readings to the computer, making the system think there’s a leak when there isn’t. |
| Charcoal Canister | If clogged, cracked, or saturated, it can’t properly trap and store fuel vapors as designed. |
| Fuel Tank | Rust, holes, or damage prevents the system from maintaining proper pressure and containing fuel vapors. |
| Engine Control Module (ECM)/Powertrain Control Module (PCM) | A faulty computer can misinterpret signals from various EVAP components, triggering false error codes. |
Makes Commonly Affected By P0446
P0446 codes tend to affect older vehicles. It’s an unsurprising result as many vehicle systems, especially the EVAP system, deteriorate with age. At the same time, some automakers are more vulnerable to P0446 codes than others. Here’s a look at the top five automotive brands for this problem based on FIXD sensor data.
Call Nissan the “worst-of-the-worst” in this regard, with the venerable Altima leading the way. Among the ten Nissan models with a history of P0446 codes, it’s the only one with a high incident rating. The Frontier, Pathfinder, and others that follow all have level occurrences of P0446 codes.
In contrast, Chevy has two high-incident offenders: the Silverado 1500 and Impala. Meanwhile, the third-place Equinox has medium-level occurrences of P0446 codes. Toyota follows a similar pattern; the Camry and Corolla have significant histories with this problem, while the Highlander is a mid-grade example.
The F-150 tops the Ford P0446 rankings and matches the frequency of its archrival, the Chevy Silverado 1500. The Mustang and F-250 follow but at lower levels.
General Motors has another entry with its GMC division, and the Sierra pickup earns the brand’s top spot. This is a foreseeable result as the pickup is the corporate twin of the Chevy Silverado 1500. The Yukon, which also shares components with the Silverado/Sierra duo, finds its spot here, too. In another case of shared DNA, the GMC Terrain (a platform mate of the Chevrolet Equinox) completes GMC’s podium.
| Top 5 Makes Affected by P0446 | Most Affected Model(s) |
|
Nissan |
Altima |
| Frontier | |
| Pathfinder | |
|
Chevrolet |
Silverado 1500 |
| Impala | |
| Equinox | |
|
Toyota |
Camry |
| Corolla | |
| Highlander | |
|
Ford |
F-150 |
| Mustang | |
| F-250 | |
|
GMC |
Sierra |
| Yukon | |
| Terrain |
How to Diagnose The Cause of Your P0446 Code
An OBD-II scanner is at the heart of diagnosing a check engine light. Until the code is identified, you can only guess at the cause. The average car owner can use a basic code reader that plugs into the vehicle’s OBD-II port. However, these devices only display the code, not the underlying problem. Alternatively, the FIXD sensor, which plugs into the port and pairs with a smartphone app, reveals common triggers for the code, making diagnosing less time-consuming, even for a novice DIYer or curious car owner.
After confirmation of a P0446 code, you can perform a basic inspection (see below) before heading to a mechanic. You’ll need basic equipment (a flashlight, safety goggles, work gloves, and a rag). In addition, keep safety in mind by following these steps.
- Park on a level surface in a safe, well-ventilated area
- Ensure the car is off and the parking brake is engaged
- Allow the engine to cool
Symptoms of P0446 Causes
Getting to the root of an EVAP system problem can be challenging, even for a seasoned professional. Nonetheless, amateurs may want to get the ball rolling by evaluating possible trouble spots for a P0446 code.
Symptoms:
- Check engine light illuminated
- Gas smell around the fuel door
- Clicking sound not heard when tightening the cap
- Cap feels loose or won’t tighten properly
What to Inspect:
- Remove and reinstall the cap, listening for a clicking sound
- Check that the cap turns smoothly without resistance
- Inspect threading for damage
Pro Tip: Most gas caps need 3-4 clicks to tighten properly.
Symptoms:
- Check engine light illuminated
- Gas smell around the fuel door
- Clicking sound not heard when tightening the cap
- Cap feels damaged or worn
- Missing or damaged O-ring
- Cap doesn’t fit properly
What to Inspect:
- Inspect O-ring for damage or wear
- Check cap housing for cracks
- Test the cap seal by trying to twist it past the clicking point
- Look for missing or damaged components
Note: A gas cap is inexpensive—when in doubt, replace it.
Symptoms:
- Check engine light illuminated
- Gas smell around the fuel door
- Visible fuel drips or wetness around the neck
- Difficulty inserting fuel nozzle
- Unusual sounds when fueling
What to Inspect:
- Visually inspect for rust, dents, or damage
- Check for wetness or fuel residue
- Look for loose mounting points
Warning: If you see significant rust or damage, have a professional inspect it.
Fuel system repairs require special safety precautions.
Symptoms:
- Check engine light illuminated
- Gas smell under the hood or vehicle
- Poor fuel economy
- Rough idle
- Difficulty starting in cold weather
What to Inspect:
- Visual inspection of accessible lines for cracks or damage
- Check for loose connections
- Listen for hissing sounds with the engine running
- Look for brittle or aged hoses
Pro Tip: Use a flashlight and mirror to inspect hard-to-reach areas under the vehicle.
Symptoms:
- Check engine light illuminated
- Poor fuel economy
- Engine running rough
- Difficulty filling the gas tank
- Gas pump frequently clicks off while fueling
What to Inspect:
This requires professional diagnosis with specialized equipment. While you can visually inspect for apparent damage or disconnected electrical connectors, testing the valve function requires technical knowledge and tools.
Symptoms:
- Check engine light illuminated
- Difficulty filling gas tank
- Engine stalling
- Erratic fuel gauge readings
- Poor engine performance
What to Inspect:
This is not a DIY inspection task as it requires specialized diagnostic equipment and technical expertise to test sensor function and electrical signals.
Symptoms:
- Check engine light illuminated
- Strong gas smell
- Poor fuel economy
- Difficulty filling gas tank
- Black charcoal debris is visible around the canister
What to Inspect:
- Visual inspection for cracks or damage
- Check for loose mounting
- Look for black carbon debris around the canister
- Inspect connected hoses for proper attachment
Note: Testing the canister function requires professional equipment.
Symptoms:
- Check engine light illuminated
- Visible fuel leaks under the vehicle
- Fuel gauge reading irregularly
- Strong gas smell
- Poor fuel economy
- Engine stalling due to fuel delivery issues
What to Inspect:
- Visual inspection for rust or damage
- Check for wet spots or fuel odor
- Look for drips or residue under the vehicle
Warning: Never attempt to repair a fuel tank yourself. This is a serious safety hazard that requires professional attention.
Symptoms:
- Check engine light illuminated or flashing
- Multiple warning lights on the dash
- Erratic engine performance
- Poor fuel economy
- Stalling or rough running
- Failed emissions tests
What to Inspect:
This is strictly a professional diagnosis job requiring specialized diagnostic equipment and programming capabilities. No DIY inspection is recommended beyond basic visual checks for loose connections or obvious damage.
Can I drive with Code P0446?
Quick answer: Yes. For the most part, driving with a P0446 code for a few weeks shouldn’t make matters worse or risk further damage. However, due to safety risks, DON’T DRIVE with a damaged fuel tank or malfunctioning engine control module.
It can be tempting to put off P0446-related repairs. However, doing so risks causing more damage, especially to expensive components like the catalytic converter. And don’t even think of delaying repairs if there’s an emissions test on the horizon—the car won’t pass. It’s also worth emphasizing that any gasoline aroma requires immediate attention due to combustion risk.
Here’s a more detailed look at driveability with a P0446 code.
| Causes | Can I Drive? | Risks / Safety / Performance |
|---|---|---|
|
Faulty Gas Cap |
Yes, driving for a couple of weeks is acceptable. But don’t postpone repairs to avoid more problems. |
While generally safe for short-term driving, you’ll waste fuel through evaporation and potentially fail emissions tests. The more considerable risk is that fuel vapors are escaping into the atmosphere, which is both environmentally harmful and can create a fire hazard in enclosed spaces like garages. |
|
Faulty Fuel Filler Neck |
Yes, driving for a couple of weeks is acceptable. But don’t postpone repairs to avoid more problems. |
Driving with this condition risks fuel leakage, especially during cornering or sudden stops, which can create a serious fire hazard. Dirt and debris can also enter your fuel system, causing engine damage over time. |
|
Damaged EVAP line |
Yes, driving for a couple of weeks is acceptable. But don’t postpone repairs to avoid more problems. |
While not an immediate safety risk, the leaking fuel vapors are flammable and environmentally harmful. You’ll also experience decreased fuel economy and potential engine performance issues. |
|
Defective Charcoal Canister Vent Control Valve |
Yes, driving for a couple of weeks is acceptable. But don’t postpone repairs to avoid more problems. |
Driving with this condition can cause fuel tank pressure problems, which can lead to difficulty fueling and poor engine performance. |
|
Faulty Fuel Tank Pressure Sensor |
Yes, driving for a couple of weeks is acceptable. But don’t postpone repairs to avoid more problems. |
While not immediately dangerous, this can lead to incorrect fuel system readings, which can cause poor engine performance and potential stalling. |
|
Malfunctioning Charcoal Canister |
Yes, driving for a couple of weeks is acceptable. But don’t postpone repairs to avoid more problems. |
This allows raw fuel vapors to escape into the atmosphere, which can lead to failed emissions tests. However, it won’t typically cause immediate vehicle failure. Driving long-term with this condition can damage other EVAP system components. |
|
Broken Fuel Tank |
No. Don’t drive with a damaged fuel tank due to the safety risk. |
This is extremely dangerous, and the vehicle should not be driven. Fuel leaks create an immediate fire hazard and risk of explosion. Even small fuel tank cracks can rapidly become larger under the vibration of driving. |
|
Malfunctioning Engine Control Module (ECM)/Powertrain Control Module (PCM) |
No. It’s best not to drive with a defective ECM because it can cause hesitation, stalling, and other hazards. |
This can cause unpredictable engine behavior, including sudden stalling, power loss, or surging, making driving dangerous, especially in traffic. The vehicle might also run rich or lean, potentially causing expensive engine damage over time. |
DIY | How To Fix P0446 Causes
With luck, a loose or damaged gas cap is the reason beyond a P0446. The procedure for correcting this is outlined below. For those comfortable with a more involved fix, replacing a faulty EVAP line is a possibility. This is also covered. Just remember that EVAP system problems have been vexing experienced mechanics for half a century. So, despite your best intentions and skills, a DIY effort for a P0446 code may not be in the cards. Before plunging into any car repair on your own, know your limits. Hiring a mechanic is often the smartest way to avoid additional headaches and potential injuries.
Possible Cause: Damaged or Defective Gas Cap
What is it?
A properly functioning gas cap maintains fuel system pressure. If the cap is loose, misaligned, or damaged, it can cause a pressure drop and vapor leak, potentially triggering a P0446 code. An improperly closed or defective gas cap can lead to the same problem.
How hard is it to fix?
Difficulty Level: Easy
Fixing a gas cap issue is simple: ensure it’s tightened correctly or replace it with a compatible, quality cap. After the repair, drive your vehicle for a few cycles or use a diagnostic tool (like the FIXD app) to clear the check engine light and P0446 code. Avoid cheap replacements that may not seal properly.
Cost of Repairs
There’s no expense if the problem is traced to a misaligned gas cap. Otherwise, a replacement costs $20 to $60.
Possible Cause: Faulty EVAP line
What is it?
A damaged EVAP line can cause system leaks, triggering the P0446 code. In this case, replacing the faulty hose usually fixes the issue.
How hard is it to fix?
Difficulty Level: Moderate
Replacing a faulty EVAP hose varies in difficulty based on its location. Engine bay repairs are often manageable for those with moderate skills. However, hoses near the axle, suspension, or gas tank may require professional help due to limited access. After the repair, drive the vehicle for several cycles or use an OBD-II scanner to clear the check engine light.
Cost of Repairs
A replacement EVAP line usually costs $30 to $70.
Other DIY Considerations for Code P0446
As covered earlier, EVAP system repairs involve many possibilities, some of which involve advanced training and sophisticated diagnostic equipment. For instance, working on the engine control module is not for the faint of heart or the inexperienced. Meanwhile, working around the gas tank requires experience and observing safety protocols. These and other requirements explain the limited opportunities for P0446-related repairs by DIYers.
Before dealing with any code P0446-related repair, check whether your car is under warranty. You can save money by letting the automaker handle the work. In addition, research if there are any technical service bulletins (TSBs) for your car. TSBs are official repair/correction notices issued by the manufacturer that cover specific problem areas. You can research this online or contact a dealer.
P0446 Code FAQs
What makes and models does code P0446 affect the most?
Here’s a breakdown of the vehicles most affected by code P0446, according to FIXD sensor data collected in 2023.
| Make | Model | Occurrence Frequency |
| Chevrolet | Impala | High |
| Chevrolet | Silverado 1500 | High |
| Ford | F-150 | High |
| GMC | Sierra | High |
| Nissan | Altima | High |
| Toyota | Camry | High |
| Toyota | Corolla | High |
| Chevrolet | Avalanche | Medium |
| Chevrolet | Colorado | Medium |
| Chevrolet | Equinox | Medium |
| Ford | Mustang | Medium |
| GMC | Yukon | Medium |
| Toyota | 4Runner | Medium |
| Toyota | Highlander | Medium |
| Toyota | Prius | Medium |
| Toyota | RAV4 | Medium |
| Toyota | Sequoia | Medium |
| Toyota | Sienna | Medium |
| Toyota | Tacoma | Medium |
What are typical code P0446 symptoms?
Most drivers will first notice an illuminated check engine light on their dashboard. Other common symptoms vary depending on the specific cause but can include:
Fuel System Issues:
- Gas smell (around fuel door, under hood, or vehicle)
- Difficulty filling the gas tank/pump by clicking off repeatedly
- Fuel gauge reading irregularly
- Visible fuel leaks or wetness (in severe cases)
Performance Issues:
- Poor fuel economy
- Rough idle or running
- Engine stalling (especially in cold weather)
- Erratic engine performance
Other Signs:
- Failed emissions tests
- Multiple warning lights (in cases of ECM/PCM issues)
- Black charcoal debris is visible around the canister area (if the canister is failing)
- Unusual sounds when fueling
Are P0446 Chevy codes common?
Yes, FIXD sensor data shows that Chevrolets are among the most likely vehicles to get P0446 codes. The Silverado 1500 pickup and Impala sedan have especially high occurrence levels for this problem. Other vulnerable vehicles include the Equinox, Colorado, and Avalanche.
References:
Repair-cost estimates, repairpal.com (various dates). Retrieved December 17, 2024, from repairpal.com.
Dave Goldberg is an automotive journalist and lifelong car fanatic. He writes for numerous enthusiast and business outlets and is an ongoing contributor to HotCars.com, one of the most popular car culture websites. When he’s not writing or driving, Dave is either under a hood or asleep. His credentials include a BA in Journalism from The George Washington University.
41 Responses
Hi , I’m having a p0446 vent valve circuit mal function, and I have replace so far gas cap, purge valve, vent valve, canister is good , no luck!!! What could be the cause the trigger this code? Please any help will be appreciated (Chevy s10 2003 v6 vortec)
my 2006 ford explorer has gone into like a limp mode twice the only code i get is a po0446 any ideas thx.
Fixd is so good that I figure out the engine light up issue. I replaced the gasket of fuel cap and clear the engine light. That is it. Thanks Fixd team. You have been giving me big help.
You’re so welcome, Charlie! Thank you so much for the kind words and for using FIXD. 🙂 Happy and safe driving!
Check engine lite came on, replaced all hoses on Evap canister and gas cap, reset the flag, all is well
your fixd module works great
I had issues with not being able to fill up my tank w/out it clicking off 100 times. 15+ min to fill-up my tank was getting out of hand. So, I looked up this symptom and it suggested the evap canister needs to be replaced. Mind you, no code had ever shown up, but I replaced the darn thing for $600 for the part. Pretty easy swap. Anyhow, I’m still getting the same symptom at the pump; which is quite annoying; and still, no “check engine” light. S.O.S!!! Thoughts?
My 2004 Chevy Suburban 1500 is impossible to fill at the pump without babying it and keeps giving me the P0446 code. I watched a zillion videos on these symptoms all pointing to the evap canister, purge valve solenoid and vent filter solenoid. The purge valve solenoid tested good and I replaced the vent filter solenoid. I also removed the canister and checked for any loose charcoal that might have made it’s way into any of the vent lines causing a clog, it looked ok. The only other part of the system I haven’t checked is the pressure sensor on the top of the tank(which I don’t want to mess with if possible). And from what I understand, it wouldn’t cause the to be hard to fill anyway. I am going to remove the vent line from the fuel tank to the evap canister and try to fill the tank with fuel.
Stay tuned!!
Just got back from the gas pump and filling problem is gone. My next step will be to reconnect the fuel tank vent hose to the charcoal canister and disconnect the hose that leads to the evap vent filter solenoid. My next fill up should isolate wether I need to replace the charcoal canister or continue the diagnostic process.
My 2011 Suburban is incredibly difficult to fill up. It will take about half a gallon before clicking off and that’s if it’s barely going in. Takes 10 minutes or longer to fill the tank. Its been doing this for almost a year but I never had a code until yesterday. Hopefully I can get it resolved soon.
I have a 1998 Chevy Silverado C1500 (5.7L). Getting codes P0446 and P1441 Where does this point to for the fix assuming that maybe one problem is causing both codes?
Lexus ES 300 – got the only code p0446. replaced with a new evap canister assembly . After driving for about 6 months the same code came again. what else would cause this single code.
What if you are getting the P0446 code and
the Tahoe is hard to start after putting gas in the tank??
I have that on my Silverado; they diagnosed it as fuel pump and are replacing the fuel pump today.
On my 2004 Sierra replacing the Purge Valve in the Intake Manifold fixed this same problem.
I was having this problem on my 2008 Chevy Malibu. Replacing the purge valve fixed the problem.
Could this issue have anything to do with the Coolant Reservoir?
No, coolant reservoir is only used with the radiator
Hi
I have P0441,p0442 and P0446 showing on my Lexus RX .
Please should I do.
Regards
I had an issue where I popped a few fuses and relays, I want to double check this particular relay or fuse, but can’t figure out which ones to check.
I took my brothers Chevy silveraldo and had it hooked up to diagnostic and two codes came up. One I pretty much understand with thermostat. But this evaporative emission system vent control circuit has me in a pickle. My question is call I still drive it until I can get it fixed? Thsnks
I have a 2008 Ford F-150 4.6liter engine,I replaced the intake manifold because it was leaking and after I replaced the code p0446and p0452 codes came up on the check engine light also it shakes when I’m driving and don’t have the same power.
Got a po446 code. Put on new gas cap, changed evap, even got cadillac converter checked, code wont clear. 2006 cadillac dts.
Took my Buick Century in, they did a smoke test and it was repaired ($400 for parts including a new gas cap), the code came back; the mechanics took a second look and said a purge valve o-ring was stiff and wasn’t sealing, said the cost was $35 to fix that….makes me wonder if the $400 for the evap solenoid and new gas cap was really needed.
I hav a 2006 Chevy 3500 Express RV conversion. My generator runs on fuel from my tank. Everything else checks out. Any ideas?
FIXD is such a great thing. Thank you so much. I’ve used it several times for problems on my car and work van. They have been 100% right. Every time. Saved me tons of money. But most of all. Saved me aggravation. Love it !!!
I’m still getting a P0446 code and haven’t been able to figure out why. I’ve installed a new gas cap, vent solenoid valve. Purge valve and pressure sensor unit on the fuel tank and still get the P0446 code. Any ideas?
Hi Darrell,
There are a number of possibilities of this trouble code and it’s awesome to hear that you’ve eliminated a few already! Before moving forward I would advise that you run tests to make sure you need to replace the parts or not. Check out this video on diagnosing and finding your issue!
If you still run into problems you may need to go to a mechanic.
Thank you,
The FIXD Team
I just got this code on my car is it still safe to drive until I can repair? Will that cause car to cut off?
Hello,
The trouble code P0446 will not give you any drivability issues, but just like all check engine lights, it should be repaired as soon as possible.
The FIXD Team
I took my car with more than two mechanics, each one was saying something, I didn’t know exactly where the defect is, but with this FIXD sensor I knew where the problem is, thank you Fixd I love it!
That makes us so happy to hear, Amanuel! We are so glad that we were able to help you know what is going on with your car to protect you from unnecessary repairs. Happy and safe driving 🙂
My check engine light won’t come on when I turn the key and I can’t pass the emissions test
unplug the battery for 10 minutes then plug it back, that will clear all the Check Engine Light, then take the car to the emission test.
I’ve done that when I had my code 0446 with Check Engine Light on before I bought FIXD, nowadays I use FIXD to turn Check Engine Light off with ease.
Hope that helps
Already took care of it, the pressure/purge sensor on top of the fuel tank wasn’t functioning
Good to hear Marc!
Can I fix this myself?
Thanks for all the tips and advice. I just went ahead and replaced the purge valve. Of course the mounting bolt broke off. Bench tested the old solenoid and it was intermitten holding. Think I got it.
My 07 H2 had that issue so I replaced the canister (ta-dah. All is good). One week later we had a tropical storm and major flooding… can’t avoid every pothole filled with water (Come on I live in Jersey!) Service engine light again and code P0446. Can the flooding potholes effect my canister?
This tool is the greatest thing I ever bought you guys are great
Thanks Bobby! We appreciate it!
FIXD Team
How did you figure out this specific problem?