CCM-001F

Condition
Diagnostic trouble code (DTC) CCM-001F is stored if the control module registers that the signal from the air quality sensor has a pulse length which exceeds 97% of the period.

Condition
- The control module does not permit the recirculation shutter to close in the air quality sensor mode while the fault persists
- No air quality function.

Possible source
- Open-circuit in the signal cable
- Short-circuit to supply voltage in the signal cable
- Defective air quality sensor.

Condition
- Poor air quality in the passenger compartment.