P20BD

46C4 - P20BD

Information saved in
DDE

Fault code
46C4 - P20BD

Fault text
DDE: Reducing-agent pressure-line heating, activation:
Open circuit

Fault description
The DDE recognizes an open-circuit error at the output
stage:
Metering line/delivery module heater.

Condition for fault identification
Test condition:
The test routine is executed continuously.
Voltage condition:
The test routine is executed continuously.

Condition for fault memory entry
Debounce (1000 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
3. Inspect fuse.
4. Replace relay.
5. Replace power switch.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
Heater circuit 2 is for the metering wire and delivery
module.
If DTC 4C72 or 49ED is logged, this is a collateral error and
shuts down the relay. Repair this malfunction and delete
stored DTCs from the error memory.