Engine Controls System: 120408

120408 - P1260

Information saved in
DME

Fault code
120408 - P1260

Fault text
Charge-air pressure control, deactivation: charge-air
pressure buildup disabled

Fault description
The diagnostic function monitors the DME's deactivation of
active boost.

Condition for fault identification
Test condition:
Collective fault, only serves to trigger the emissions warning
lamp, and can also trigger a CC message. The response to
the fault is specified for a different fault entry.
Potential problem source(s):
- None
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
- None

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

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: none
- US emissions warning lamp: on
- US electronic engine power reduction: on
- CC message: on

Service instruction
- Boost-pressure control is deactivated to protect the engine.