ME9 / P0030 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
O2S 1 Preheather Circuit, Open
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage should be between 10.7 and 18 Volts. |
Fault criteria:
| When output voltage is the same as the output's own internal voltage (Pull-Up) for more than 5.6 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:
| (See also description of readings/activations in diagnostic tool) |
