Engine

P003F — Camshaft Profile Control "A" Stuck On (Bank 2)

Severity: medium Drive with care, to a shop

What P003F means

The engine control module uses an oil-pressure actuator, commanded by a solenoid, to change camshaft timing or profile. P003F is set when the bank 2 camshaft profile control "A" stays in the on position and does not return when commanded. The actual cam position then doesn't match the target, so the engine runs less efficiently.

Symptoms

  • Check Engine light on
  • Reduced engine power
  • Rough or erratic idle
  • Worse fuel economy
  • Abnormal throttle response

Possible causes

  1. Faulty bank 2 camshaft profile control solenoid or actuator
  2. Low oil level or poor oil quality (dirty, wrong viscosity)
  3. Damaged wiring or poor connection at the solenoid connector
  4. Faulty camshaft position sensor
  5. ECM software or hardware fault (uncommon)

How to diagnose

  1. Scan all codes and freeze frame data, then clear the code and see if it returns
  2. Check oil level, condition and that it matches the manufacturer's spec
  3. Inspect the bank 2 solenoid wiring and connector for damage, corrosion and oil intrusion
  4. Test solenoid resistance and verify power and control signal from the ECM
  5. Remove the solenoid and inspect it and its screen for debris or sticking
  6. Compare commanded and actual cam angles on a scan tool and check the camshaft position sensor readings
  7. Check for ECM software updates if everything else tests good

Common fixes

  • Replace the bank 2 camshaft profile control solenoid or actuator
  • Change the engine oil and filter with the specified type
  • Repair the wiring or replace the connector
  • Replace the camshaft position sensor if it is faulty

Questions and answers

What does P003F mean?

It means the camshaft profile control "A" actuator on bank 2 is stuck in the on position. The usual culprits are the solenoid, the oil, or the wiring.

Can an oil change fix P003F?

Sometimes. Variable valve timing relies on oil pressure, so dirty or wrong oil can make the actuator stick. If the code returns after a change, check the solenoid and wiring.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.