4D76 - P007B (DDE)

4D76 - P007B

Information saved in
DDE

Fault code
4D76 - P007B

Fault text
Charging air temperature sensor, plausibility: Difference,
starting value to reference temperature too high

Fault description
Boost-air temperature plausibility check. The DTC is logged
when the temperature diference between the boost-air
temperature and a calculated reference temperature rises
above a limit defined based upon operating conditions.
The limit value is calculated using the engine's downtime
and a characteristic curve.

Condition for fault identification
Test condition:
The error check runs once per driving cycle provided that
compliance with the following conditions is present:
- The engine downtime (time between engine shutdown and
next Terminal 15 on) is greater than or equal to 19800 s.
- No electrical error is logged.
- The reference temperature is above the threshold -40 �C.
Voltage condition:
The error check runs once per driving cycle provided that
compliance with the following conditions is present:
- The engine downtime (time between engine shutdown and
next Terminal 15 on) is greater than or equal to 19800 s.
- No electrical error is logged.
- The reference temperature is above the threshold -40 �C.

Condition for fault memory entry
-None.

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
Replace charge-air temperature sensor.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
If electrical sensor faults are present (short circuit, open
circuit) these should also be logged.