Error code

OBD2 P0119

OBD2P0119
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Engine Coolant Temperature Circuit Intermittent.

Severity

moderateCan drive, but performance issues and potential overheating may occur.

Summary

P0119 indicates an intermittent issue with the engine coolant temperature (ECT) sensor circuit, which can affect how the vehicle's computer monitors engine temperature.

Symptoms

  • Check Engine Light is on
  • Poor fuel economy
  • Engine may run rough or misfire
  • Vehicle starts but runs poorly

Common Causes

  • Low coolant level
  • Defective ECT sensor harness or connector
  • ECT sensor electrical circuit poor connection
  • Faulty engine coolant thermostat
  • Defective ECM/PCM (less common)

Diagnosis

  1. Check coolant level and condition
  2. Inspect ECT sensor wiring and connector for damage or corrosion
  3. Test resistance of the ECT sensor at different temperatures
  4. Verify proper operation of cooling fan

Fixes

  • Replace faulty ECT sensor if necessary

FAQ

What should I do if my Check Engine Light comes on with P0119?

Check the coolant level and condition, inspect the ECT sensor wiring and connector for damage or corrosion, and test the resistance of the ECT sensor at different temperatures.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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