P0024 Code- Camshaft Position 'B' Timing Over-Advanced or System Performance Bank 2

What Does Code P0024 Mean

P0024 is the OBD-II generic code indicating the Engine Control Module (ECM) has determined that the bank 2 exhaust camshaft is in a more advanced position than what the ECM expected. The over advanced position can be during the retarding or advancement phase of the camshaft timing.

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Possible symptoms

• Engine Light ON (or Service Engine Soon Warning Light)

What causes the P0024 code?

• By using the camshaft and crankshaft sensors, the ECM detects the camshaft timing to be over advanced.
• The Oil Control Valve (OCV) to the bank 2 camshaft is stuck closed or has clogged passages.
• The oil is too thick, causing the passages to become clogged due to lack of oil flow to or from the camshaft phasers that control the timing.
• The camshaft phaser is stuck in the advanced position due to damage or defects.

Troubleshooting P0024

• Use a multi meter and take resistance
• As a general rule- every terminal needs to be checked for a solenoid failure. If it does not have a 7-12 ohm on the multi meter, it is most likely failed. Always pin test from the valve solenoid to PCM or ECM.
• Pin test means you must check continuity in the wiring harness between the actual valve solenoid and the brain (computer pcm/ecm)
• While pin testing in back probe, wiggle test all related harnesses and observe readings on vault meter/multi meter
• Check all engine grounds
• Also, clean and tighten every harness terminals from the valve solenoid to the pcm. The integrity of those contacts must be tightly mated and lubricated with grease to make sure full electric contact is present. The misdiagnosed problem is engine vibration which will loosen the harness connecters because most variable cam shaft timing systems rely on high revolution engines. So, any loose wiring or connections may cause this code. It does not mean the actual valve is a problem.
  • First check the resistance of the actual valve. Most only have two terminals, will likely present 7-12 oms.
  • Often the intake camshaft valve solenoid will be the issue, so interchange the two valves one for another and clearing codes.
  • If the code changes to the intake then it is P0021
  • The intake and the exhaust solenoid will have the same type of connection and are interchangeable. Try interchanging one solenoid for the other. If after erasing all present codes, a different code comes back, then you have essentially eliminated the actual valve solenoid and have saved hours of diagnostic work. By interchanging most times if one code changes to the other, you can got your parts guy and ask for the valve solenoid.
• The failure of the solenoid VVC or VCT is usually due to oil blockage from the screen/filter.

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