OBD Guide
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P11A1

Camshaft Adjustment Actuator 'A' Cylinder 1

P11A1 is an OBD-II diagnostic trouble code meaning: Camshaft Adjustment Actuator 'A' Cylinder 1. Common causes: vvt solenoid valve malfunction, clogged oil channels of the vvt system. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Increased fuel consumption
  • Unstable idling
  • Difficulty starting the engine

Causes

  • VVT solenoid valve malfunction
  • Clogged oil channels of the VVT system
  • Mechanical damage to the phase change mechanism
  • Problems with wiring harness or contacts
  • Low oil pressure or using the wrong oil

How to Fix

  1. Check the level and condition of the engine oil
  2. Diagnose VVT solenoid valve
  3. Check the condition of the oil channels
  4. Test the electrical control circuit
  5. If necessary, replace the VVT mechanism

Related codes

P11A2P11A0P0010P0011

FAQ

What does the P11A1 code mean?

P11A1 is an OBD-II diagnostic trouble code that indicates: Camshaft Adjustment Actuator 'A' Cylinder 1

What causes a P11A1 error code?

The most common causes of P11A1 include: VVT solenoid valve malfunction; Clogged oil channels of the VVT system; Mechanical damage to the phase change mechanism; Problems with wiring harness or contacts.

How do I fix a P11A1 diagnostic trouble code?

To fix P11A1: Check the level and condition of the engine oil. Diagnose VVT solenoid valve. Check the condition of the oil channels. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P11A1?

Yes, but get it checked soon

How much does it cost to fix P11A1?

The estimated repair cost for P11A1 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat