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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Powertrain Diagnostic Procedures) >> Diagnostic Information And Procedures >> DRIVEABILITY - NGC - Diagnostic Tests >> P0128-Thermostat Rationality >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. GOOD TRIP EQUAL TO ZERO
  2. OTHER POSSIBLE CAUSES
  3. LOW COOLANT LEVEL
  4. THERMOSTAT OPERATION
  5. SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
  6. TEMPERATURE SENSOR
  7. SIGNAL CIRCUIT OPEN
  8. (K4) SENSOR GROUND CIRCUIT OPEN
  9. SIGNAL CIRCUIT SHORTED TO GROUND
  10. SIGNAL CIRCUIT SHORTED TO THE (K4) SENSOR GROUND CIRCUIT
  11. PCM