T8 / P0134 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
O2S Circuit. No Activity Detected. Sensor 1.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
On-board diagnosis
Type of diagnosis:
Enable criteria:
| • | Battery voltage must be between 11 - 16 V. |
| • | Lambda status 0.15 or 16. |
| • | EVAP, leakage diagnostics inactive. |
| • | Preheating active for more than: |
| (depending on start temperature, the lowest of coolant and intake air temperature is selected) |
| • | NONE of the following DTCs must be detected: |
Fault criteria:
| When voltage across the sensor has not been outside of the range 0.30-0.60 V for 10 s. |
Dependent:
System reaction to a fault:
| Preheating of oxygen sensors 1 and 2 is stopped. |
| Fuel adaptation is reset and switched off. |
OK report:
| Diagnosis completed without fault report. |
Fault handling:
| (See section Fault handling III, "Other emission-related components and functions" for more information.) |
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) |
