Code 76 (Idle CO-Potentiometer)

Defect Code 76:

•D• 1 Defect code memory: 76 Idle CO-potentiometer:

Explanation: Only applicable to vehicles without a catalytic converter. This defect code is stored when shorts or breaks occur at the potentiometer or on its supply wire.

Effect of defect: A substitute value of 1.25 V is set. The emission CO value may deviate from the nominal value.

Troubleshooting:

- Read out CO-potentiometer actual value with ~ 2 Status monitoring.

- Check CO-potentiometer (in HLM) and supply wires.

- Measure CO content in exhaust emission.

For test values, see - Component Testing -.
CO Potentiometer (on HLM)