OBD Guide
ENFRDEESPT

P11AF

Camshaft Adjustment Actuator 'B' Cylinder 4

P11AF is an OBD-II diagnostic trouble code meaning: Camshaft Adjustment Actuator 'B' Cylinder 4. Common causes: vvt solenoid valve malfunction, open or short circuit in control circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • The Check Engine light comes on
  • Reduced engine power
  • Unstable idling
  • Increased fuel consumption
  • Characteristic knocks from the timing belt area

Causes

  • VVT solenoid valve malfunction
  • Open or short circuit in control circuit
  • Contamination or jamming of the phase shifter
  • Low oil level or poor quality oil used
  • Problems with system power or grounding

How to Fix

  1. Check the level and condition of the engine oil
  2. Diagnose VVT solenoid valve
  3. Check the integrity of the wiring harness and connectors
  4. Clean or replace solenoid valve
  5. Replacing the phase shifter in case of mechanical damage

Related codes

P11AEP11B0P0011

FAQ

What does the P11AF code mean?

P11AF is an OBD-II diagnostic trouble code that indicates: Camshaft Adjustment Actuator 'B' Cylinder 4

What causes a P11AF error code?

The most common causes of P11AF include: VVT solenoid valve malfunction; Open or short circuit in control circuit; Contamination or jamming of the phase shifter; Low oil level or poor quality oil used.

How do I fix a P11AF diagnostic trouble code?

To fix P11AF: Check the level and condition of the engine oil. Diagnose VVT solenoid valve. Check the integrity of the wiring harness and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P11AF?

Limited driving only, diagnose soon

How much does it cost to fix P11AF?

The estimated repair cost for P11AF is $28–89. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat