1F0524

1F0524 - P3337

Information saved in
DME

Fault code
1F0524 - P3337

Fault text
DME, internal fault: Monitoring of the nominal oxygen
sensor value

Fault description
The diagnostic function monitors the DME's internal status.

Condition for fault identification
Test condition:
The fault is recognized by the self-diagnosis.
Potential problem source(s):
- Wiring harness defective
- Oxygen sensor defective
- DME defective
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- Engine ON

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

Action in service
- Check wiring harness between oxygen sensor and DME
- Replace oxygen sensor
- Only replace the DME if the fault remains present
continuously or if the fault frequency is greater than 3

Fault effect and breakdown warning
Breakdown notice:
- It is possible to continue driving the vehicle, but passing
maneuvers should not be attempted owing to reduction in
engine output.
Possible apparent symptoms:
- Loss of power
- Speed limitation

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

Service instruction
- A terminal status switch must be conducted before this
fault can be deleted.