OBD Guide

U3575

Coolant Mixing Valve Position Sensor Circuit

U3575 is an OBD-II diagnostic trouble code meaning: Coolant Mixing Valve Position Sensor Circuit. Common causes: valve position sensor malfunction, open or short circuit in the circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect engine temperature
  • Insufficient interior heating
  • Engine overheating
  • Check Engine Light Is On
  • Reduced cooling system efficiency

Causes

  • Valve position sensor malfunction
  • Open or short circuit in the circuit
  • Poor contact in connectors
  • Mechanical valve failure
  • Problems with ECU software

How to Fix

  1. Check the integrity of the sensor circuit
  2. Check contacts in connectors
  3. Check the mechanical operation of the valve
  4. Replace position sensor if necessary
  5. Update ECU software if necessary

Related codes

Error U3575 by Vehicle Brand

FAQ

What does the U3575 code mean?

U3575 is an OBD-II diagnostic trouble code that indicates: Coolant Mixing Valve Position Sensor Circuit

What causes a U3575 error code?

The most common causes of U3575 include: Valve position sensor malfunction; Open or short circuit in the circuit; Poor contact in connectors; Mechanical valve failure.

How do I fix a U3575 diagnostic trouble code?

To fix U3575: Check the integrity of the sensor circuit. Check contacts in connectors. Check the mechanical operation of the valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U3575?

Limited driving only, diagnose soon

How much does it cost to fix U3575?

The estimated repair cost for U3575 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat