Engine

P001D — Camshaft Profile Control Circuit Open, Bank 2 (Camshaft A)

Severity: medium Drive with care, to a shop

What P001D means

The engine computer controls a camshaft profile actuator, such as a variable valve timing system, and monitors its electrical circuit. P001D sets when it sees an open circuit or fault in the control circuit for camshaft A on bank 2. Bank 2 is the side of the engine that does not contain cylinder 1. With the fault present, the ECM cannot adjust valve operation accurately.

Symptoms

  • Check Engine light is on
  • Reduced power and sluggish acceleration
  • Rough or unstable idle
  • Worse fuel economy
  • Hesitation or occasional stalling
  • Inconsistent throttle response

Possible causes

  1. Open, chafed or corroded wiring or connector in the camshaft profile control circuit
  2. Failed camshaft profile actuator or VVT solenoid
  3. Faulty camshaft position sensor
  4. Low oil level, dirty oil or the wrong viscosity
  5. Rarely, ECM software or hardware failure

How to diagnose

  1. Scan all codes and freeze frame data, then clear the code and see if it returns.
  2. Check oil level and condition, and confirm the oil matches the manufacturer's specification.
  3. Inspect the bank 2 VVT solenoid harness and connector for rubbing, corrosion, loose pins or damage.
  4. Test the circuit with a multimeter: solenoid coil resistance, wire continuity, power and ground per the wiring diagram.
  5. Command the solenoid with a scan tool active test, if supported.
  6. Compare camshaft and crankshaft position sensor data and cam timing values on the scan tool.
  7. Look for ECM software updates or service bulletins only after ruling out wiring and parts.

Common fixes

  • Repair the wiring or connector, or replace the damaged harness section
  • Replace the VVT solenoid or camshaft profile actuator
  • Replace the camshaft position sensor if it tests faulty
  • Change the oil and filter using the specified oil
  • Update or replace the ECM if everything else checks out

Questions and answers

What does P001D mean?

It is a generic code meaning the ECM detected an open or faulty circuit for the camshaft A profile control on bank 2. It is usually tied to the variable valve timing system.

Can I drive with P001D?

Only briefly and carefully, for example to a shop. The engine may lose power and run roughly, so do not put off diagnosis.

Can oil cause P001D?

Oil can affect VVT operation because the system runs on oil pressure. But this code points to an electrical circuit problem, so check the wiring and solenoid as well.

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.