Code 42 (Vehicle Speed)

VEHICLE SPEED SIGNAL
Explanation
This trouble code is stored when the road speed signal is not plausible while driving. The prerequisite for this is an engine speed >2500 rpm at high load for at least 10 sec.

Troubleshooting
- If the indicated speed (speedometer) is "OK", check wire to the Digital Motor Electronic (DME) control unit. If no faults are found, check the instrument cluster.
- Proceed with displayed scan tool diagnostic instructions where applicable.