4276 - P0135 (DDE)

4276 - P0135

Information saved in
DDE

Fault code
4276 - P0135

Fault text
DDE: Oxygen sensor, heater: Temperature too low

Fault description
Oxygen sensor heater diagnosis. The diagnostic trouble code
is logged in the ECU when the calculated oxygen sensor
temperature is less than or equal to the limit value 720 �C.

Condition for fault identification
Test condition:
The error check is implemented when the following
conditions are satisfied:
- The debounced value for battery voltage is greater than the
limit value 10700 mV. The debounce times for the battery
voltage are 0 ms and 2000 ms.
- No overrun is detected. The debounce times for overrun
detection are 100 ms and 100 ms.
- The heater control is active.
- The oxygen sensor resistance signal Ri is valid.
- No other fault is present.
- The heating does not detect shunt current.
Voltage condition:
The error check is implemented when the following
conditions are satisfied:
- The debounced value for battery voltage is greater than the
limit value 10700 mV. The debounce times for the battery
voltage are 0 ms and 2000 ms.
- No overrun is detected. The debounce times for overrun
detection are 100 ms and 100 ms.
- The heater control is active.
- The oxygen sensor resistance signal Ri is valid.
- No other fault is present.
- The heating does not detect shunt current.

Condition for fault memory entry
Debounce (60000 ms) 60000 ms. For short-distance
diagnosis the time is divided by 2.

Action in service
Replace oxygen sensor.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none