P0116 OBD II Trouble Code Engine Coolant Temperature (ECT) Circuit Range/Performance Problem DTC

Detailed information on troubleshooting and repairing a p0116 vehicle trouble code which refers to a malfunction in the engine coolant temperature (ECT) circuit range and or performance. Also includes links to relevant forum topics on the code.

Symptoms of P0116 OBD II Trouble Code

  • MIL (Malfunction Indicator Lamp) illumination
  • Poor drivability
  • Black smoke at tailpipe
  • Poor fuel economy
  • May not idle
  • May exhibit stalling or misfires

Common Causes of P0116 OBD II Trouble Code

  • Missing or stuck-open thermostat
  • Bad ECT sensor
  • Short or open on signal wire
  • Short or open on ground wire
  • Poor connections in wiring