Engine

P002A — Camshaft Profile Control Circuit "B" Open, Bank 1

Severity: medium Drive with care, to a shop

What P002A means

The engine control module (ECM) drives an actuator or solenoid that changes camshaft profile or valve timing, and it monitors the electrical circuit. P002A sets when the "B" control circuit on bank 1 reads open or out of the expected range. The system then cannot adjust valve timing properly.

Symptoms

  • Check Engine light on
  • Reduced power and sluggish acceleration
  • Rough or unstable idle
  • Worse fuel economy
  • Hesitation or stalling under load

Possible causes

  1. Open, damaged or corroded wiring or connector in the control circuit
  2. Faulty camshaft timing solenoid or actuator
  3. Dirty, old or wrong-viscosity engine oil
  4. Low oil level or a clogged solenoid screen
  5. Failed ECM (uncommon)

How to diagnose

  1. Scan all codes and freeze-frame data, and look for other cam timing or sensor codes
  2. Check oil level and condition, and confirm the viscosity matches the specification
  3. Inspect the solenoid wiring and connector for chafing, corrosion or loose pins
  4. Test the control circuit for opens and shorts to ground or power using the wiring diagram
  5. Measure the solenoid coil resistance and compare it to the spec
  6. Check power and control signal at the connector, and command the solenoid with a scan tool if possible
  7. Remove the solenoid and inspect it and its screen for debris or sticking
  8. Suspect the ECM only after everything else checks out

Common fixes

  • Repair the wiring or replace the damaged connector
  • Replace the timing solenoid or actuator
  • Change the oil and filter with the correct grade and clean the solenoid screen
  • Reflash or replace the ECM if all else is good
  • Clear the code and road-test to confirm it does not return

Questions and answers

What does P002A mean?

It means the ECM detected an open or faulty electrical circuit for camshaft profile control "B" on bank 1, so it cannot control valve timing normally.

Can I drive with P002A?

Only briefly and only to a repair shop. The engine can lose power, run rough or stall under load.

Can bad oil cause P002A?

Oil can affect solenoid operation, since the system is oil-driven. But because this code points to an open circuit, check the wiring and connector first.

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.