ME9 / P0131 00
Read the instructions below then
start the fault diagnostic procedure.
O2S 1 Circuit, Low Voltage
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage should be between 10.7 and 16 Volts. |
Fault criteria:
| One or more sensor leads (pins 3, 19, 35 & 52 on ECM) short circuited to ground for more than 25 seconds. |
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) |
