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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2050 (Engine Controls - Diagnostic Subroutines - 6.4L 99R Diesel -- F250-F550 Super Duty) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P00B7 - Engine Coolant Flow Performance

P00B7 - Engine Coolant Flow Performance

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P00B7 - Engine Coolant Flow Performance

Description:  This DTC sets when frequent or large fluctuations in engine coolant temperature are detected at a stabilized operating temperature above the thermostat opening temperature 86°C (188°F). A DTC may set if the engine coolant temperature is higher than expected at the point of the thermostat open event following an extended soak.
Possible Causes: 
  • Low engine coolant level
  • Coolant quality and maintenance
  • Cooling system pressure relief cap
  • Thermostat
Diagnostic Aids:  The coolant temperature fluctuations may vary depending on speed, load, and ambient temperature conditions.
Application    Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST K .