4D88

4D88 - P040C

Information saved in
DDE

Fault code
4D88 - P040C

Fault text
Exhaust gas temp. sensor after exhaust gas recirculation
cooler, signal: Short circuit to ground

Fault description
Exhaust-gas temperature behind EGR cooler sensor
monitoring. The diagnostic trouble code is logged when the
raw sensor signal (voltage) is less than the maximum
approved limit value 80 mV.

Condition for fault identification
Test condition:
The monitoring function is only implemented when no
sensor power-supply problem is logged.
Voltage condition:
The monitoring function is only implemented when no
sensor power-supply problem is logged.

Condition for fault memory entry
Debounce (600 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
Replace exhaust-gas temperature sensor behind EGR cooler.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none