P042B OBD II Trouble Code Catalyst Temperature Sensor Circuit Range Performance Bank 1 Sensor 2

How to quickly diagnose, repair, and info on symptoms and causes of a P042B engine code which means the bank 1 sensor 2 catalyst temperature oxygen sensor circuit has a range or performance problem.

Symptoms of P042B OBD II Trouble Code

  • Illuminated check engine light
  • Poor engine performance
  • Decreased fuel economy
  • Increased emissions

Common Causes of P042B OBD II Trouble Code

  • Faulty oxygen sensor
  • Wiring problems
  • Exhaust air/fuel mixture out of balance
  • Faulty PCM/PCM programming

Severity of P042B OBD II Trouble Code

The severity of this code is moderate. Symptoms of a P042B engine code may include: