U0694
Lost Communication With Hybrid/EV Battery Pack Coolant Pump A
U0694 is an OBD-II diagnostic trouble code meaning: Lost Communication With Hybrid/EV Battery Pack Coolant Pump A. Common causes: open or short circuit in the pump circuit, cooling pump malfunction. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- Hybrid/electric system power reduction
- Battery overheating
- Error message on the instrument panel display
- System transition to emergency mode
Causes
- Open or short circuit in the pump circuit
- Cooling pump malfunction
- Problems with connectors or wiring harness
- Control module malfunction
- Problems in the CAN network
How to Fix
- Check fuses and relays associated with the pump
- Inspect connectors and wiring harness for damage
- Check the functionality of the cooling pump
- Scan the CAN network for errors
- Repair only from an authorized dealer
Related codes
Error U0694 by Vehicle Brand
FAQ
What does the U0694 code mean?
U0694 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Hybrid/EV Battery Pack Coolant Pump A
What causes a U0694 error code?
The most common causes of U0694 include: Open or short circuit in the pump circuit; Cooling pump malfunction; Problems with connectors or wiring harness; Control module malfunction.
How do I fix a U0694 diagnostic trouble code?
To fix U0694: Check fuses and relays associated with the pump. Inspect connectors and wiring harness for damage. Check the functionality of the cooling pump. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0694?
Do not drive — repair immediately
How much does it cost to fix U0694?
The estimated repair cost for U0694 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat