U0649
Lost Communication With Coolant Pump D
U0649 is an OBD-II diagnostic trouble code meaning: Lost Communication With Coolant Pump D. Common causes: open or short circuit in the pump circuit, coolant pump malfunction. Estimated repair cost: $56–167.
Symptoms
- Engine overheating
- Unstable operation of the cooling system
- Check Engine light comes on
- Reduced cooling efficiency
Causes
- Open or short circuit in the pump circuit
- Coolant pump malfunction
- Wiring Harness Problems
- ECU malfunction
How to Fix
- Check the continuity of the coolant pump circuit
- Check the condition of the wiring harness
- Test the coolant pump
- Check ECU software for updates
Related codes
Error U0649 by Vehicle Brand
FAQ
What does the U0649 code mean?
U0649 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Coolant Pump D
What causes a U0649 error code?
The most common causes of U0649 include: Open or short circuit in the pump circuit; Coolant pump malfunction; Wiring Harness Problems; ECU malfunction.
How do I fix a U0649 diagnostic trouble code?
To fix U0649: Check the continuity of the coolant pump circuit. Check the condition of the wiring harness. Test the coolant pump. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0649?
Limited driving only, diagnose soon
How much does it cost to fix U0649?
The estimated repair cost for U0649 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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