P1919
Engine Coolant Temperature Signal
P1919 is an OBD-II diagnostic trouble code meaning: Engine Coolant Temperature Signal. Common causes: coolant temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $6–22.
Symptoms
- Unstable engine operation at idle
- Increased fuel consumption
- The engine takes a long time to warm up
- Incorrect temperature readings on the dashboard
- Difficulty starting in cold weather
Causes
- Coolant temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Sensor contact corrosion
- Engine control unit malfunction
How to Fix
- Check sensor resistance at different temperatures
- Inspect the integrity of wires and connectors
- Clean the sensor contacts from corrosion
- Replace the coolant temperature sensor if necessary
- Flash the ECU if you suspect a software error
Related codes
FAQ
What does the P1919 code mean?
P1919 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Temperature Signal
What causes a P1919 error code?
The most common causes of P1919 include: Coolant temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Sensor contact corrosion.
How do I fix a P1919 diagnostic trouble code?
To fix P1919: Check sensor resistance at different temperatures. Inspect the integrity of wires and connectors. Clean the sensor contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1919?
Yes, but get it checked soon
How much does it cost to fix P1919?
The estimated repair cost for P1919 is $6–22. Actual cost depends on your vehicle, location, and labor rates.
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