P1798
Coolant Temperature Circuit Malfunction
P1798 is an OBD-II diagnostic trouble code meaning: Coolant Temperature Circuit Malfunction. Common causes: coolant temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $6–28.
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Engine overheating
- Check Engine Light Is On
- Incorrect temperature readings on the dashboard
Causes
- Coolant temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Wiring harness damage
- ECU malfunction
How to Fix
- Check the continuity of the coolant temperature sensor circuit
- Check the sensor connector for oxidation or damage.
- Replace the coolant temperature sensor if necessary
- Check and replace wiring harness if necessary
- Check the operation of the computer
Related codes
Error P1798 by Vehicle Brand
FAQ
What does the P1798 code mean?
P1798 is an OBD-II diagnostic trouble code that indicates: Coolant Temperature Circuit Malfunction
What causes a P1798 error code?
The most common causes of P1798 include: Coolant temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a P1798 diagnostic trouble code?
To fix P1798: Check the continuity of the coolant temperature sensor circuit. Check the sensor connector for oxidation or damage.. Replace the coolant temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1798?
Limited driving only, diagnose soon
How much does it cost to fix P1798?
The estimated repair cost for P1798 is $6–28. Actual cost depends on your vehicle, location, and labor rates.
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