P0032

2C9C - P0032

Information saved in
DME

Fault code
2C9C - P0032

Fault text
Oxygen sensor heating before catalytic converter, activation

Fault description
HO2S Heater Control Circuit High (Bank 1 Sensor 1)

Condition for fault identification
Test condition:
Driver circuit diagnosis for O2 sensor heater
UBatt > 10V
Sensors installed
No fault memories
Terminal condition: Terminal 15, engine on
Voltage condition:
none

Condition for fault memory entry
Active immediately after terminal 15 change; electr. faults
entered within a few seconds

Action in service
1. Visual inspection of wires, DME plug and O2 sensor for
damage
2. Check wires
3. Check plug-in connections DME <=> Wiring harness
<=> Upstream O2 sensor forward of catalyst for Bank 1
4. Replace O2 sensor
5. Replace DME

Fault effect and breakdown warning


Driver information
Warning light:
MIL ON

Service instruction
none