P12DB

121533 - P12DB

Information saved in
DME

Fault code
121533 - P12DB

Fault text
Boost pressure sensor, plausibility: Pressure before throttle
valve too low when engine not running

Fault description
The diagnostic function monitors the boost pressure.

Condition for fault identification
Test condition:
The fault is recognized when the boost pressure is lower
than the ambient barometric pressure while the engine is not
running.
Potential problem source(s):
- Defect in boost-pressure system
- Defect in wiring harness between boost-pressure sensor
and DME
- Boost-pressure sensor defective
- DME defective
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- Engine OFF

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

Action in service
- Check operation of air system (wastegate, etc.)
- Check 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