U3574
Coolant Mixing Valve
U3574 is an OBD-II diagnostic trouble code meaning: Coolant Mixing Valve. Common causes: mix valve malfunction, open or short circuit in the circuit. Estimated repair cost: $28–89.
Symptoms
- Uneven interior heating
- Engine overheating or insufficient warming up
- Hot air on one side only
- Flashing temperature indicator
Causes
- Mix valve malfunction
- Open or short circuit in the circuit
- Poor contact in the connector
- Control module malfunction
- Mechanical valve jamming
How to Fix
- Check valve circuit fuse
- Check valve resistance
- Inspect connectors and wiring
- Check valve operation when voltage is applied
- If necessary, replace the mixing valve
Related codes
Error U3574 by Vehicle Brand
FAQ
What does the U3574 code mean?
U3574 is an OBD-II diagnostic trouble code that indicates: Coolant Mixing Valve
What causes a U3574 error code?
The most common causes of U3574 include: Mix valve malfunction; Open or short circuit in the circuit; Poor contact in the connector; Control module malfunction.
How do I fix a U3574 diagnostic trouble code?
To fix U3574: Check valve circuit fuse. Check valve resistance. Inspect connectors and wiring. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3574?
Limited driving only, diagnose soon
How much does it cost to fix U3574?
The estimated repair cost for U3574 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat