121602 - P0299 (DME)

121602 - P0299

Information saved in
DME

Fault code
121602 - P0299

Fault text
Charge-air pressure sensor: pressure too low

Fault description
During the control module's shutdown phase the diagnostic
function monitors the barometric pressure sensor, intake-
manifold sensor and the pressure sensor on the air-intake
side of the throttle valve to determine whether they are all
measuring the same pressure.

Condition for fault identification
Test condition:
The fault is recognized when the boost-pressure sensor
deviates from the average for the pressure sensors
(barometric pressure, boost pressure, intake-manifold
pressure) by less than 70 mbar.
Potential problem source(s):
- Wiring harness defective
- Error in sensor measurement
- Sensor has been tampered with
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- 5 sec. after engine off
Other conditions:
- Engine on
- Rail pressure > 4 MPa

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

Action in service
- Check wiring harness
- Replace sensor

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
None

Driver information
Warning light:
MY10 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
MY11 ECE:
- ECE emissions warning lamp: on
- ECE electronic engine power reduction: on
- CC message: on

Service instruction
None