OBD Guide
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C2366

TCS Valve Primary USV1 Error

C2366 is an OBD-II diagnostic trouble code meaning: TCS Valve Primary USV1 Error. Common causes: usv1 valve fault, open or shorted valve control circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • TCS/ESP indicator lights up
  • Reduced effectiveness of the traction control system
  • Problems with braking due to wheel slipping

Causes

  • USV1 valve fault
  • Open or shorted valve control circuit
  • Problems with the TCS control module
  • Defective wiring harness

How to Fix

  1. Check the USV1 valve control circuit for opens and shorts
  2. Check valve resistance USV1
  3. Test valve operation using diagnostic equipment
  4. Replace valve or wiring harness if faulty

Related codes

C2367C2365C1201

FAQ

What does the C2366 code mean?

C2366 is an OBD-II diagnostic trouble code that indicates: TCS Valve Primary USV1 Error

What causes a C2366 error code?

The most common causes of C2366 include: USV1 valve fault; Open or shorted valve control circuit; Problems with the TCS control module; Defective wiring harness.

How do I fix a C2366 diagnostic trouble code?

To fix C2366: Check the USV1 valve control circuit for opens and shorts. Check valve resistance USV1. Test valve operation using diagnostic equipment. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2366?

Do not drive — repair immediately

How much does it cost to fix C2366?

The estimated repair cost for C2366 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat