E39 / P0030 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P0030 00

Fault symptom

CHECK ENGINE.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage must be between 11 - 18 V.

Engine running.

Fault criteria:

The voltage across the sensor is outside of the calibrated range.

Checking the wiring harness

Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.

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)