Engine

P000A — Camshaft Position "A" Slow Response, Bank 1

Severity: medium Drive with care, to a shop

What P000A means

P000A means the bank 1 "A" camshaft (usually the intake) is moving to its commanded position more slowly than the PCM expects. Variable valve timing (VVT) uses oil pressure and a control solenoid to shift the camshaft relative to the crankshaft. The PCM compares the camshaft sensor signal with its command, and if the cam lags, it sets the code and turns on the check engine light.

Symptoms

  • Check engine light on
  • Rough idle
  • Reduced power and sluggish acceleration
  • Higher fuel consumption
  • Unusual engine noise or rattle
  • Possible stalling at idle

Possible causes

  1. Low, dirty, or wrong-viscosity engine oil
  2. Faulty or sticking VVT solenoid (oil control valve)
  3. Clogged solenoid screen or VVT oil passages
  4. Faulty camshaft position sensor
  5. Stretched timing chain or worn timing components
  6. Damaged wiring or connectors in the VVT solenoid or sensor circuit

How to diagnose

  1. Scan for all codes and freeze frame data, noting any related cam or crank codes
  2. Check oil level and condition, and confirm the oil matches the specified viscosity
  3. Inspect wiring and connectors at the VVT solenoid and cam sensor for damage, corrosion, or oil contamination
  4. Test solenoid coil resistance and check power and ground per the factory wiring diagram
  5. Command the solenoid with a scan tool and remove it to inspect the screen
  6. Measure oil pressure with a mechanical gauge
  7. Compare commanded and actual cam angle in live data and check the timing chain for slack

Common fixes

  • Change the oil and filter using the specified grade
  • Clean or replace the VVT solenoid
  • Replace the camshaft position sensor
  • Repair the damaged wiring or connectors
  • Replace the timing chain or belt, tensioners, guides, and the cam phaser if needed

Questions and answers

Can I drive with a P000A code?

Briefly and carefully, yes, but find the cause soon. If oil level or pressure is low, the engine can suffer serious wear.

Will an oil change fix P000A?

Often it can, when dirty or incorrect oil is making the VVT system respond slowly. Clear the code afterward and see whether it returns.

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.