Powertrain, generic · Fuel and air metering, auxiliary emission controls

P001F A Camshaft Profile Actuator A Control Circuit High Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

A camshaft profile actuator switches the intake camshaft (camshaft A) on bank 2 between two or more fixed cam profiles with different valve lift and duration, for example by shifting a cam piece axially or by locking rocker arms or tappets with oil pressure. Unlike a camshaft phaser it does not shift the timing continuously. The second letter "A" in the title numbers the actuator on this camshaft. This code is set when the control circuit reads too high, typically because of a short to battery voltage or overcurrent in the output stage. The engine usually stays on one profile, typically the base profile with low lift. Some manufacturers report these faults with their own codes instead. Bank 2 exists only on V and boxer engines.

Likely causes

Control wire shorted to battery voltage
Actuator coil shorted, causing overcurrent
Connector corroded or contaminated with oil
Output driver in the engine control module faulty

Symptoms

  • Check engine light on
  • Less power at high engine speed because the profile does not switch
  • Higher consumption or uneven part-load running, depending on the profile
  • Engine speed may be limited

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–500
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

camshaft profile actuator intake bank2camshaft profile actuator wiringengine control module

Related codes

P001DP001EP001CP002FP003E

References: law.cornell.edu, en.wikipedia.org, audi-technology-portal.de, en.wikipedia.org.