P0135

2742 - P0135

Information saved in
DME

Fault code
2742 - P0135

Fault text
Oxygen sensor heater resistance diagnosis before cat.
converter, Bank 1

Fault description


Condition for fault identification
Test condition:
* Determination of heater current and conversion to heater
resistance * min. K_LSHVK_DIAG_ANZ_MESS
calculations of heater resistance * No errors related to heater
power driver
Terminal condition: Engine running
Voltage condition:
ub > K_ED_PlusMin

Condition for fault memory entry
The upper or lower resistance threshold limit has been
violated.
(K_LSHVK_DIAG_RU/K_LSHVK_DIAG_RO)

Action in service
1. Check plug and wiring harness to pre-catalyst oxygen
sensor forward of Bank 1 catalyst
2. If OK, replace oxygen sensor

Fault effect and breakdown warning
MIL lamp on after engine runs 2x /Small influence on
drivability

Driver information
Warning light:
No

Service instruction
none