E39 / P0068 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Check Engine Performance loss. The motor may turn off.

P0068 00

Fault symptom

Check Engine

Performance loss.

The motor may turn off.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Engine running.

Fault criteria:

Calculated air mass, based on the throttle angle and engine speed, do not correspond with the current air mass.

System reaction to a fault:

Limp home

Fault handling:

Type III

(See section Fault handling III, "Other emission-related components and functions" for more information.)

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:

First check the integrity of the intake system. Then continue with fault diagnosis.

Functions in the diagnostic tool related to the fault:

Test value:

Air Mass Flow

Throttle Position

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