P0425 OBD II Trouble Code Catalyst Temperature Sensor Circuit Malfunction (Bank 1, Sensor 1)

How to diagnose, repair, and info on causes of a P0425 engine code which involves the bank 1 catalyst temperature oxygen sensor circuit which has malfunctioned. Also includes links to relevant forum topics on the code.

Symptoms of P0425 OBD II Trouble Code

Common Causes of P0425 OBD II Trouble Code

Severity of P0425 OBD II Trouble Code

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