P1A79
Starter/Generator Control Module Coolant Temperature Sensor 3 Circuit Low Voltage
P1A79 is an OBD-II diagnostic trouble code meaning: Starter/Generator Control Module Coolant Temperature Sensor 3 Circuit Low Voltage. Common causes: coolant temperature sensor malfunction, open or short circuit in the electrical circuit. Estimated repair cost: $17–56.
Symptoms
- Check Engine light comes on
- Deterioration of the starter/generator system
- Battery charging problems
- Reduced hybrid system efficiency (if applicable)
- Unstable engine operation at idle
Causes
- Coolant temperature sensor malfunction
- Open or short circuit in the electrical circuit
- Poor contact in sensor connectors
- Starter/Generator Control Module Malfunction
- Circuit Grounding Problems
How to Fix
- Check the integrity and resistance of the temperature sensor
- Inspect the electrical circuit for damage
- Check the quality of contacts in the connectors
- Scan the control module for other errors
- If necessary, replace the coolant temperature sensor
Related codes
FAQ
What does the P1A79 code mean?
P1A79 is an OBD-II diagnostic trouble code that indicates: Starter/Generator Control Module Coolant Temperature Sensor 3 Circuit Low Voltage
What causes a P1A79 error code?
The most common causes of P1A79 include: Coolant temperature sensor malfunction; Open or short circuit in the electrical circuit; Poor contact in sensor connectors; Starter/Generator Control Module Malfunction.
How do I fix a P1A79 diagnostic trouble code?
To fix P1A79: Check the integrity and resistance of the temperature sensor. Inspect the electrical circuit for damage. Check the quality of contacts in the connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1A79?
Yes, but get it checked soon
How much does it cost to fix P1A79?
The estimated repair cost for P1A79 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat