P0052

2C9D - P0052

Information saved in
DME

Fault code
2C9D - P0052

Fault text
Oxygen sensor heating before catalytic converter 2,
activation

Fault description
HO2S Heater Control Circuit High (Bank 2 Sensor 1)

Condition for fault identification
Test condition:
Diagnostic voltage (max) at power stage
Terminal condition: Heater
battery voltage
Voltage condition:
battery voltage<11V oder Ubatt > 16 volts

Condition for fault memory entry
Hardware diagnosis by power stage internal thresholds

Action in service
Check plug / wiring harness / sensor, replace DME as
indicated

Fault effect and breakdown warning


Driver information
Warning light:
MIL on (in 2nd driving cycle)

Service instruction
none