U0627
Lost Communication With A/C Refrigerant Temperature Sensor A
U0627 is an OBD-II diagnostic trouble code meaning: Lost Communication With A/C Refrigerant Temperature Sensor A. Common causes: open or short circuit in the sensor circuit, refrigerant temperature sensor malfunction. Estimated repair cost: $17–56.
Symptoms
- Air conditioner doesn't work
- The air conditioner is unstable
- Hot air from ducts
- Check Engine light comes on
- Reduced cooling efficiency
Causes
- Open or short circuit in the sensor circuit
- Refrigerant temperature sensor malfunction
- Poor contact in the sensor connector
- Wiring harness damage
- Air conditioning computer malfunction
How to Fix
- Check the integrity of the sensor circuit
- Check the resistance of the coolant temperature sensor
- Inspect connectors and contacts for corrosion
- Check for breaks in the wiring harness
- If necessary, replace the coolant temperature sensor
Related codes
Error U0627 by Vehicle Brand
FAQ
What does the U0627 code mean?
U0627 is an OBD-II diagnostic trouble code that indicates: Lost Communication With A/C Refrigerant Temperature Sensor A
What causes a U0627 error code?
The most common causes of U0627 include: Open or short circuit in the sensor circuit; Refrigerant temperature sensor malfunction; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a U0627 diagnostic trouble code?
To fix U0627: Check the integrity of the sensor circuit. Check the resistance of the coolant temperature sensor. Inspect connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0627?
Yes, but get it checked soon
How much does it cost to fix U0627?
The estimated repair cost for U0627 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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