AutoCodes - OBDII Code List - B0940

B0940 - Coolant Level Sensor Circuit Open

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

B0940 Possible Causes

What does this mean?
  • 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 B0940?

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 B0940 code

Labor: 1.0

The cost of diagnosing the B0940 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)

B0940 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.
OBDII Code B0940 - Coolant Level Sensor Circuit Open - AutoCodes.com

More Information

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