P12A0

121530 - P12A0

Information saved in
DME

Fault code
121530 - P12A0

Fault text
Charge-air pressure sensor, plausibility: pressure before
throttle valve too high

Fault description
The diagnostic function monitors the boost pressure.

Condition for fault identification
Test condition:
The fault is recognized when, prior to engine start, the
absolute boost pressure is greater than 3.0 bar, or the
absolute boost pressure is greater than 1.4 bar.
Potential problem source(s):
- Defect in boost-pressure system
- Defect in wiring harness between boost-pressure sensor
and DME
- Boost-pressure sensor defective
- Defective DME
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check air-induction system operation (wastegate, etc.,...)
- Inspect wiring harness between DME and boost-pressure
sensor
- Boost-pressure sensor
- Replace DME

Fault effect and breakdown warning
Breakdown notice:
Standard EML Text
Possible apparent symptoms:
Reduced power

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

Service instruction
None