U0623
Lost Communication With Coolant Pump A
U0623 is an OBD-II diagnostic trouble code meaning: Lost Communication With Coolant Pump A. Common causes: open or short circuit in wiring, coolant pump malfunction. Estimated repair cost: $56–167.
Symptoms
- Engine overheating
- Unstable engine operation
- Check Engine Light Is On
- Reduced cooling system efficiency
Causes
- Open or short circuit in wiring
- Coolant pump malfunction
- Problems with connectors
- ECU malfunction
How to Fix
- Check the integrity of wiring and connectors
- Check the functionality of the coolant pump
- Check fuses and relays
- Carry out ECU diagnostics
Related codes
Error U0623 by Vehicle Brand
FAQ
What does the U0623 code mean?
U0623 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Coolant Pump A
What causes a U0623 error code?
The most common causes of U0623 include: Open or short circuit in wiring; Coolant pump malfunction; Problems with connectors; ECU malfunction.
How do I fix a U0623 diagnostic trouble code?
To fix U0623: Check the integrity of wiring and connectors. Check the functionality of the coolant pump. Check fuses and relays. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0623?
Do not drive — repair immediately
How much does it cost to fix U0623?
The estimated repair cost for U0623 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat