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

P0024 "B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The engine control module compares the commanded position of the exhaust camshaft on bank 2 with the actual position it calculates from the camshaft and crankshaft sensors. This code is set when the camshaft sits further advanced than commanded for longer than a calibrated time, or, depending on the manufacturer, when the target is missed in either direction ("system performance"). Typical cause is a phaser that does not return to its rest position, for example because the oil control valve sticks open or its screen is clogged. Bank 2 exists only on V and boxer engines; it is the cylinder bank without cylinder 1.

Likely causes

Oil level too low, oil sludged or wrong viscosity
Screen at the oil control valve clogged with debris
Oil control valve mechanically sticking
Cam phaser worn or its locking pin sticking
Timing chain worn or fitted incorrectly after a repair

Symptoms

  • Check engine light on
  • Rough idle and hesitation
  • Engine may stall at idle
  • Rattling from the timing drive at cold start
  • Higher fuel consumption

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–1,800
Time0.5–8 h

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

Parts involved

cam phaser exhaust bank2oil control valve exhaust bank2engine oiltiming chain

Related codes

P0025P000DP0023P0011P0014P0021P0019

References: law.cornell.edu, saabwisonline.com, saabwisonline.com, static.nhtsa.gov.