Air & Fuel Mixture ControlOBD2 Codes

P0024 – Meaning, Causes, Symptoms, & Fixes

Code P0024 Definition

Exhaust Camshaft Timing- Over-Advanced Bank 2

What Does Code P0024 Mean?

The variable valve timing system increases fuel economy and engine performance by regulating when the intake and exhaust valves are opened and closed. The camshaft(s) is(are) adjusted by the ECM through the use of an oil control valve(s) (OCV) also called variable valve timing control solenoid valves. When trouble code P0024 is set, it means that the exhaust camshaft in Bank 2 is more advanced than the ECM has told it to be.

What Are The Symptoms Of Code P0024?

  • Check Engine Light
  • The hard start of the engine
  • Rough running engine
  • Stalling
  • Rattling/Knocking from engine
  • Decreased fuel economy
  • Failed emissions test

What Is The Cause Of Code P0024?

  • Engine oil is dirty
  • Engine oil is too low
  • Engine oil is incorrect viscosity
  • Camshaft variable timing solenoid failure
  • Camshaft phaser is seized in the advanced position
  • Continuous oil flow to Variable Camshaft Timing chamber

How Serious Is Code P0024? – Severe

This trouble code severely impacts the drivability of your vehicle. The most common problems consist of increased engine stalling, rough engine idle, lowered fuel economy, and rattling/knocking noises from the engine. Continuing to drive the vehicle in this condition can cause severe damage to multiple internal engine components.

Code P0024 Common Diagnosis Mistakes

Replacing sensors or components without any indication of a problem with the sensors or components.

Tools Needed to Diagnose:

  • FIXD
  • Basic hand tools
  • Fused jumper wires
  • Vehicle specific service manual

How To Diagnose And Repair Code P0024:

Difficulty of Diagnosis and Repair – (3 out of 5)

  1. Check to see if there are any other codes along with P0024 and clear your Check Engine Light with FIXD.
  2. Check the engine oil level and condition. If it’s low, adjust to spec and test drive to see if the concern is resolved. If it’s dirty, change the oil and filter and test drive to see if the concern is resolved.
  3. Remove the oil cap and/or the valve cover and inspect the valve train for sludge. If there is sludge, there is a good chance the engine will need to be replaced due to sludge blocking the oil passages to the Oil Control Valve(s).
  4. If there isn’t any sludge, consider checking the Bank 2 Exhaust Camshaft Oil Control Valve for proper function. You can do this by removing the Oil Control Valve and supplying power and ground to the solenoid quickly using a pair of fused jumper wires. (Do not leave power applied for more than a second or two) If the valve is functioning properly, it should click, and you may even be able to see the valve move based on the design of your specific valve. If it doesn’t click or move, replace the tested oil control valve and test drive to see if the concern is resolved. 
  5. If at this point the concern persists, there could be internal engine issues, and you should have a shop diagnose the concern to avoid replacing the engine unnecessarily. 

Estimated Cost of Repair

For error code P0024, 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.

  • Oil Change $20-$60
  • Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
  • Engine $3000-$4000

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  1. From what I just read, this code and its related causes are important but not critical. So, I will wait to see if the code returns since I have already turned it off and the symbol is gone for now. if it returns, as I expect it will since this is the second time, I will take it to my repair shop and have them perform needed repairs they deem required.
    This code P0024 occurred on our 2014 Chevy Impala.

  2. This happened on our 2013 impala, curious to know if u found the problem or has it been fine since the code left

  3. I wouldn’t call this a severe issue – modern engine ECM’s will revert to failsafe operating mode, and likely run poorly – not severe unless you ignore it… Good diagnosis and possible easy fix re: oil change / check. However – saying there is a possibility of needing to replace the engine because of an oil issue is pretty ridiculous.

    1. Well Tom, can you please tell us how YOU would fix an engine that has internal blockage due to poor maintenance?

      This component operates on oil pressure. If there’s no oil pressure reaching the valve it will never work properly. Many states require emissions testing which a vehicle in this condition will automatically fail for a check engine light. It will also fail for being above rated emissions due to the problem.

      Since there is no other part you can replace, how would you fix it???

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