P00B6 OBD II Trouble Code Radiator Coolant Temperature/Engine Coolant Temperature Correlation

How to quickly diagnose, repair, and info on causes of a P00B6 trouble code which indicates a correlation problem between the radiator and engine coolant temperature sensor readings.

Symptoms of P00B6 OBD II Trouble Code

  • Excessively rich exhaust
  • Drivability issues
  • Poor idle quality
  • Seriously diminished fuel efficiency

Common Causes of P00B6 OBD II Trouble Code

  • Defective ECT sensor
  • Faulty radiator coolant temperature sensor
  • Insufficient coolant level
  • Shorted or open circuits or connectors
  • Bad PCM or PCM programming error

Severity of P00B6 OBD II Trouble Code

As ECT sensor input is critical to fuel delivery and ignition timing strategy, the conditions that contribute to a stored code P00B6 should be addressed with urgency.