Ignition Systems ControlOBD2 Codes

P0332 – Meaning, Causes, Symptoms, & Fixes

P0332

What Does Code P0332 Mean?

  • P0332 definition: Knock Sensor 2 Low Circuit Input (Bank 2)
  • Issue Severity: SEVERE – Stop driving immediately
  • Repair Urgency: Fix this code immediately (same day if possible) to avoid internal engine damage.
  • Diagnosis: Pinging damages the lifetime of a vehicle’s engine and can affect its ability to run cleanly and efficiently. The PCM cannot get the correct information if the knock sensor is malfunctioning and can damage the lifetime of the engine.

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Knock sensors are solely used for the purpose of sensing when your engine is “knocking,” or sensing when the air/fuel mixture combusts prematurely. This delivers less power and can also damage the engine if prolonged. When the engine “knocks” there is also an excessive amount of NOx that is released. When trouble code P0332 is set, the Power Control Module (PCM) has received a reading from knock sensor 2 in Bank 2 that is too low, and it will not be able to accurately send a ping to correct a problem.

P0332 Causes

There are many potential causes of code P0332.

  • Faulty knock sensor
  • Fault in the knock sensor circuitry
  • Faulty EGR system

P0332 Symptoms

  • Check Engine Light
  • Higher emissions
  • Loss of power
  • Pinging in the engine
  • Lower fuel economy

How Do I Fix Code P0332?

With a knock sensor fault, the first step is to get it diagnosed to figure out what is causing the problem. 

If your vehicle has this fault and you’re not comfortable diagnosing this issue at home, we recommend finding a RepairPal certified shop nearby to pinpoint the problem and give an accurate estimate for repairs. 

These shops can not only help you figure out what’s going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing.

> Find a RepairPal Certified Shop Near You

How Much Does It Cost to Fix Code P0332?

P0332 can be caused by anything from damaged wiring to a bad knock sensor to an overheating engine. It’s impossible to give an accurate estimate without properly diagnosing the issue first. 

If you take your car to a shop for diagnosis, most shops will start with an hour of “diag time” (the time spent in labor diagnosing your specific issue). Depending on the shop’s labor rate, this typically costs somewhere between $75-$150. Many, if not most, shops will apply this diagnosis fee to any required repairs if you have them perform the repairs for you. From there, a shop will be able to give you an accurate estimate for repairs to fix your P0332 code.

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  • Minimum 12-month, 12,000-mile warranty
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Possible Repair Costs for P0332

For error code P0332, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair.

  • Knock sensor: $297 to $381
  • Knock sensor harness: $14 to $66
  • Temperature sensor: $392 to $427

DIY Steps to Diagnose Code P0332

Engine code P0332 could be caused by a number of things, including damaged wiring, a bad knock sensor, or an overheating engine. If you’d like to try to fix code P0332 at home without throwing money at parts, you’ll want to follow the steps below for proper diagnosis. Keep in mind this is an intermediate-level diagnosis and repair and not recommended for beginners. Diagnosis requires more specialized equipment beyond what the FIXD Sensor can provide and it can be a time and labor-intensive process for inexperienced DIYers.

DIY difficulty level: Intermediate

This repair requires mechanical knowledge and is not recommended for beginners.

Tools/parts needed (our top picks from Amazon):

  • FIXD
  • Live Data (Found on FIXD App with Sensor)

STEP 1: USE FIXD TO ENSURE NO OTHER ENGINE CODES ARE PRESENT.

Use FIXD to scan your vehicle to verify P0332 is the only code present. If not, make a note of the additional codes, as they help diagnose the problem.

STEP 2: CLEAR CODES, DO A ROAD TEST.

Clear the fault codes with your FIXD sensor, then go for a drive to see if the problem comes back. Include some uphills and hard acceleration, which are both conditions that would cause engine knock. If the Check Engine Light comes back on, scan the codes again to see if they are the same or different than the first time.

STEP 3: CHECK KNOCK SENSOR SIGNAL.

Using FIXD Live Data, check the knock sensor voltage to ensure that it is within the specified range. If it is not, or if there is no signal at all, skip to Step 5.

STEP 4: CHECK TEMPERATURE SENSOR SIGNAL.

Using FIXD Live Data, check the temperature sensor voltage to ensure that it is within the specified range. If it is not, the temperature sensor may be sending false readings to the PCM, which could cause a lean running condition and engine knock. Check the temperature sensor and wiring and replace if necessary.

STEP 5: INSPECT KNOCK SENSOR WIRING.

Visually inspect the wiring around the knock sensor for disconnected or damaged wires.

STEP 6: REPLACE KNOCK SENSOR AND HARNESS.

If the conclusion is that the knock sensor needs to be replaced, then it is often recommended to replace not only the sensor but the knock harness as well.

Common P0332 diagnosis mistakes

Replacing the knock sensor without inspecting the wiring or connectors first.

Still Need Help Fixing Code P0332?

If you’ve followed the steps above and are still experiencing check engine code P0332, please contact the FIXD Mechanic Hotline if you’re a FIXD Premium subscriber or find a RepairPal certified shop near you to get the right repairs at a fair price.

Justin-Hughes

Recovering autocross and track day enthusiast. Once turned a VW Jetta into a pickup truck. Lives in a van down by the river. Dream car: 2001 Subaru WRC rally car.

Justin Hughes
Recovering autocross and track day enthusiast. Once turned a VW Jetta into a pickup truck. Lives in a van down by the river. Dream car: 2001 Subaru WRC rally car.

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    8 Comments

    1. Thanks, good advice, but how do you change the knock sensor.

      1. Depends on vehicle but you take off the intake manifold now keep in mind you will need a new intake gasket. You will also need a fuel line disconnect tool very cheap for a set then a few other tools and start tearing apart. Go on YouTube to watch 1a auto they have good videos

    2. feel cool AIR but fan will not blow. How can fix?

      1. that sounds like a blower motor problem. Make sure your getting power to the blower motor. If you are then replace your blower motor. It’s very simple you could go on YouTube and look it you or you could simply go behind your glove box it’s very simple fix.

    3. Having this problem with my 2003 Silverado 1500 5.3 engine. I replaced both knock sensors and the harness. Both new sensors ohm check good, 99K ohms across them. I replaced the wiring harness at the same time. Now, i get the DTC for BOTH knock sensors. I double checked the continuity of the harness, get the same resistance as testing at the sensor itself. Any ideas on what the problem is?

      1. I have done the exact same thing. GM parts, 15 ft lbs torque. Everything, still both knock sensor codes. Anybody got any ideas?

      2. Have you cleaned/ replaced the egr valve?

      3. I have a 2003 GMC Sierra 2500hd 6.0l. I have been having a problem being able to get rid of a p0300 random misfire code. Recently I scanned my truck and not only did I still have the p0300 but I also had the p0332 knock sensor bank 2. After scanning my truck I cleared the codes by disconnecting the battery terminals but when I reconnected them and tried to start the truck all it will do is crank but will not start. I checked all the fuses the fuel delivery and numerous wiring which all of that checked out fine. When I checked to see if I had spark I found that I now have no spark on all 8 cylinders. My question is can a knock sensor cause me to have no spark on all cylinders.

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