Engine-Codes - Generic - B0939

B0939 - Coolant Level Sensor Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

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 is the B0939 code repair?

Start by checking 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.

What is the cost to diagnose the B0939 code

Labor: 1.0

The cost to diagnose 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.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0939 Meaning

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

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Information for specific makes

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