B0939 - Coolant Level Sensor Circuit High
B0939 Possible Causes
- Low Coolant Level
- Faulty Coolant Level Sensor
- Coolant Level Sensor harness is open or shorted
- Coolant Level Sensor circuit poor electrical connection
Cost of diagnosing the B0939 code
The cost of diagnosing the B0939 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B0939 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
The Powertrain Control Module (PCM
) monitors the Coolant Level Sensor. The PCM
sets the OBDII code when the Coolant Level Sensor is not to factory specifications.
B0939 Information for specific makes