ME9 / P0030 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Malfunction Indicator Lamp

P0030 00

Fault symptom

Malfunction Indicator Lamp

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage should be between 10.7 and 18 Volts.

Engine running.

Preheating inactive.

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:

Test value:

•	O2S 1 Preheating

Activation:

•	O2S 1 Preheating

(See also description of readings/activations in diagnostic tool)