"B" Camshaft Position Actuator (Bank 1)

Generic code applying to all makes of vehicles. Refers to Variable Valve Timing (VVT) or Variable Camshaft Timing (VCT) components and the car's Powertrain Control Module (PCM).

The camshaft position (CMP) actuator is controlled by the powertrain control module (PCM) through a high control circuit and a low reference circuit. The high control circuit carries a 12 volt pulse width modulated (PWM) signal from the PCM to the CMP actuator solenoid in order to control the amount of engine oil flow to the cam phaser. The low reference circuit is used as a return circuit. The PCM has the ability to monitor the functionality of the high control and the low reference circuit. If the PCM detects an open, a short to ground, or a short to voltage, DTC P0013 sets.

The "B" camshaft refers to the exhaust, right, or rear camshaft (looking at the engine from the drivers seat). Bank 1 refers to the side of the engine that contains cylinder #1.

Symptoms include:

  • DTC set
  • Rough running engine


  • Faulty Oil Control Valve (OCV)
  • Open or short in the OCV / solenoid valve
  • Damaged PCM

Fixing this fault will normally require referring to the factory service manual. Specific makes/models will have different procedures to diagnose where and what to test. You should use a Digital Volt Ohm Meter (DVOM) and measure the resistance of the terminals on the camshaft OCV. Refer to the factory spec on the reading, if it's not good, replace the OCV assembly. Also use the DVOM to verify wiring, connectors, etc., leading from the OCV back to the PCM.

Other camshaft DTC codes: P0011, P0012, P0020, P0021, P0022

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