Description:

This error indicates that the coolant temperature sensor has a short circuit or is grounded, resulting in a voltage below the normal operating range. This could be due to a wiring issue, a defective sensor, or a grounding problem.

Reaction:

The engine control module (ECM) may not receive accurate temperature readings, potentially leading to improper engine operation and triggering a warning light on the dashboard.

Recommendations:

• Inspect Wiring and Connections:
  • Check the sensor wiring for any signs of damage or shorts.
  • Ensure all connectors are secure and free from corrosion.
• Test the Coolant Temperature Sensor:
  • Use a multimeter to check the sensor’s resistance and compare it to the manufacturer’s specifications.
  • Replace the sensor if it is out of range or defective.
• Check for Proper Grounding:
  • Ensure the sensor’s grounding is intact and not causing a short.
  • Repair any grounding issues detected.

Note:

Regular inspection of sensor wiring and connections can help prevent electrical issues that trigger this code.