AutoCodes - OBDII Code List - B0939
B0939 - Coolant Level Sensor Circuit High
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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
How do I fix code B0939?
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Cost of diagnosing the B0939 code
Labor: 1.0
The cost of diagnosing the B0939 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0939 Description
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.
More Information
Need more information on how to fix the B0939 code?Get Access to Factory Service Manuals
Information for specific makes
- B0939 BUICK Coolant Level Sensor Circuit High
- B0939 CADILLAC Coolant Level Sensor Circuit High
- B0939 CHEVROLET Coolant Level Sensor Circuit High
- B0939 GMC Coolant Level Sensor Circuit High
- B0939 PONTIAC Coolant Level Sensor Circuit High
- B0939 SATURN Coolant Level Sensor Circuit High
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