[amidgeha]

Catalyst Temperature Sensor Circuit High

The Engine Control Module (ECM) monitors the Catalyst Temperature Sensor Circuit Performance, which measures the temperature of the catalyst. Catalyst Temperature Sensor function by increasing their resistance with increasing exhaust gas temperature. The ECM sets the OBDII code when the Catalyst Temperature Sensor signal is not to factory specifications.

Cause:
Faulty Catalyst Temperature Sensor
Catalyst Temperature Sensor harness is open or shorted
Catalyst Temperature Sensor circuit poor electrical connection

Symptoms:
Check engine light