ME9 / P0135 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
O2S 1 Heater Resistance, Out of Range
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| General conditions for this DTC |
| Battery voltage should be between 10.7 and 18 Volts. |
| • | Engine has been switched off for at least 1½ h before this start. |
| • | Coolant temperature over -10°C. |
Fault criteria:
| • | PWM signal has been requested 100% for 60 seconds even though 715°C not reached. |
| • | Preheating does not reach 715°C within 35 seconds of cold start. |
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Diagnosis regards:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
