P054B

131401 - P054B

Information saved in
DME

Fault code
131401 - P054B

Fault text
VANOS, exhaust, cold start: not controllable

Fault description
The diagnostic function monitors adjustment of the exhaust
camshaft during the catalytic converter's warm-up phase.

Condition for fault identification
Test condition:
The fault is recognized when the camshaft cannot be
adjusted to the specified position.
Potential problem source(s):
- Contaminated oil passage at VANOS solenoid valve
- Oil pressure too low
- Defective wires or plug terminals on VANOS solenoid
valve
- VANOS solenoid valve seized
- VANOS solenoid valve defective
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- Engine cold start to ensure that catalyst heater is active.
Time condition:
- None
Other conditions:
- Engine ON

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present for longer than 1 min.

Action in service
- Check oil level, change engine oil and filter as indicated
- If faults related to the camshaft position sensor have been
logged, repair these first
- Check wiring harness between VANOS solenoid valve and
DME
- Perform system test
- Check camshaft and VANOS unit for freedom of
movement and mechanical damage
- Clean VANOS solenoid valve, replace as required

Fault effect and breakdown warning
Breakdown notice:
The engine reverts to its emergency limp-home program,
continued vehicle operation is possible, because power is
reduced the driver should refrain from passing maneuvers.
Possible apparent symptoms:
- Engine runs poorly

Driver information
Warning light:
MY10 ECE:
- ECE emissions warning lamp: on
- ECE electronic engine power reduction: off
- CC message: on
MY10 US:
- US emissions warning lamp: on
- US electronic engine power reduction: on
- CC message: on

Service instruction
None