2A53

2A53 - P0036

Information saved in
DME

Fault code
2A53 - P0036

Fault text
Oxygen sensor heating after catalytic converter, activation

Fault description
Post-catalyst oxygen sensor heater activation

Condition for fault identification
Test condition:
Engine running
Terminal condition: none
Voltage condition:
none

Condition for fault memory entry
0.5 sec.

Action in service
Check wiring harness
Replace oxygen sensor
Replace DME

Fault effect and breakdown warning
It is possible to continue driving. Because the oxygen sensor
cannot be used for closed-loop control the exhaust emissions
will exceed the official limits.
MIL lights up
Higher exhaust emissions
Increased fuel consumption
Surge

Driver information
Warning light:
MIL ON

Service instruction
None