P0119: Engine Coolant Temperature Circuit Intermittent
Can you still drive? Yes, but be mindful of your temperature gauge. If the gauge spikes to hot, pull over and check coolant level to rule out actual overheating.
What Does P0119 Mean?
Code P0119 means the engine coolant temperature sensor signal is fluctuating erratically or dropping out intermittently. The ECU detects sudden changes in the reported coolant temperature that do not match the expected warm-up or cool-down pattern. This is typically a connection issue at the sensor.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Loose ECT sensor connector
- Corroded wiring at the ECT sensor
- Intermittent open in the sensor circuit
- Failing ECT sensor
Symptoms
- Check engine light on
- Erratic temperature gauge readings
- Intermittent rich or lean running
- Cooling fans cycling on and off unexpectedly
Diagnostic Steps
- 1Read and document freeze frame data
- 2Monitor ECT sensor live data for erratic readings
- 3Wiggle the ECT sensor connector while watching live data
- 4Inspect wiring for damage or corrosion
- 5Replace ECT sensor if intermittent readings persist after wiring repair
Recommended Parts & Tools
engine coolant temperature sensor
electrical contact cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $20 - $200 |
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Chat with AI About P0119Commonly Affected Vehicles
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Frequently Asked Questions
Could P0119 mean my engine is actually overheating?
Usually not. P0119 is an electrical circuit issue with the sensor, not an indication of actual overheating. However, always verify coolant level and watch for steam or warning lights as a precaution.
Is the ECT sensor easy to replace?
Yes, the ECT sensor is typically a single-wire or two-wire sensor screwed into the engine block or thermostat housing. It is inexpensive and takes about 15-30 minutes to replace.
Community Fix Reports
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