Code 76 (CO Potentiometer)

Defect Code 76:

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

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

Effects of defect: A substitute value of 2.77 V is set. The emission CO value may deviate from the nominal value.

Troubleshooting:

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

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

- Measure CO content in exhaust emission.

For test values see - Component Testing.