P00B7 OBD II Trouble Code Engine Coolant Flow Low/Performance

How to quickly diagnose, repair, and info on causes of a P00B7 trouble code which indicates a detected low flow or performance problem with the engine coolant flow.

Symptoms of P00B7 OBD II Trouble Code

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

Common Causes of P00B7 OBD II Trouble Code

  • Low coolant
  • Stuck thermostat
  • Defective ECT sensor
  • Faulty radiator coolant temperature sensor
  • Shorted or open circuits or connectors
  • Bad PCM or PCM programming error

Severity of P00B7 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 P00B7 should be addressed with urgency.