B0940 BUICK - Coolant Level Sensor Circuit Open

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B0940 BUICK Possible Causes

  • Low Coolant Level
  • Faulty Coolant Level Sensor
  • Coolant Level Sensor harness is open or shorted
  • Coolant Level Sensor circuit poor electrical connection

First diagnose B0940 BUICK code

    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 terminals.

Cost of diagnosing the B0940 BUICK code

    Labor: 1.0

    The cost of diagnosing the B0940 BUICK 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.

B0940 BUICK Possible Symptoms

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

B0940 BUICK 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.
OBDII Code B0940 BUICK - Coolant Level Sensor Circuit Open - Engine-Codes.com

B0940 BUICK More Information

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