Manufacturer Code Charts: 121001

121001 - P0238

Information saved in
DME

Fault code
121001 - P0238

Fault text
Charge-air pressure sensor, electric: short circuit to positive

Fault description
The diagnostic function monitors the wire to the boost-
pressure sensor.

Condition for fault identification
Test condition:
The fault is recognized when the boost-pressure sensor's
voltage exceeds 4.9 V.
Potential problem source(s):
- Defect in wiring harness between DME and boost-pressure
sensor
- 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 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 emissions warning lamp: on
- ECE electronic engine power reduction: on
- CC message: on
- US emissions warning lamp: on
- US electronic engine power reduction: on
- CC message: on

Service instruction
None