ME9 / P0137 00
Read the instructions below then
start the fault diagnostic procedure.
O2S 2 Circuit, Low Voltage
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10 - 18 V. |
| Coolant temperature below 40°C. |
| Coolant temperature during previous driving cycle more than 60°C before engine switched off. |
Fault criteria:
| Input voltage less than 0.06 V. |
OK report:
| Fault criteria NOT fulfilled. |
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:
| • | Closed loop lambda control status |
| (See also description of readings/activations in diagnostic tool) |
