OBD-II · Engine and powertrain (P)
P0119
Engine coolant temperature sensor circuit intermittent
What it means
The coolant temperature signal jumps around or drops out briefly.
Symptoms
- temperature gauge jumping
- cooling fan switching on unexpectedly
- occasional rough running
- engine warning light
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | loose or corroded connector |
| 02 | broken wire near the sensor |
| 03 | failing sensor |
| 04 | low coolant exposing the sensor to air |
What to check, step by step
- 01Check the coolant level and bleed air from the system
- 02Wiggle-test the connector and wiring while watching live data
- 03Inspect the connector for corrosion and broken locking tabs
- 04Replace the sensor if the wiring is sound