P042A OBD II Trouble Code Catalyst Temperature Sensor Circuit Malfunction Bank 1 Sensor 2
How to quickly diagnose, repair, and info on symptoms and causes of a P042A engine code which means the bank 1 sensor 2 catalyst temperature oxygen sensor circuit has malfunctioned.
Symptoms of P042A OBD II Trouble Code
- Illuminated check engine light
- Poor engine performance
- Decreased fuel economy
- Increased emissions
Common Causes of P042A OBD II Trouble Code
- Faulty oxygen sensor
- Wiring problems
- Exhaust air/fuel mixture out of balance
- Faulty PCM/PCM programming
Severity of P042A OBD II Trouble Code
The severity of this code is moderate. Symptoms of a P042A engine code may include: