OBD Guide
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P1879

Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit

P1879 is an OBD-II diagnostic trouble code meaning: Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit. Common causes: pressure solenoid valve malfunction, open or short circuit in control circuit. Estimated repair cost: $28–133.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$28–133 (est.)

Symptoms

  • Incorrect gear shifting
  • Clutch slipping
  • Jerks during acceleration
  • Check Engine light comes on
  • Reduced engine power

Causes

  • Pressure solenoid valve malfunction
  • Open or short circuit in control circuit
  • Wiring Harness Problems
  • Hydraulic system contamination
  • Transmission control unit malfunction

How to Fix

  1. Check the condition of the wiring harness and connectors
  2. Check the resistance of the solenoid valve
  3. Clean or replace pressure valve
  4. Check the pressure in the hydraulic system
  5. If necessary, replace the transmission control unit

Related codes

P1880P1881P1882

FAQ

What does the P1879 code mean?

P1879 is an OBD-II diagnostic trouble code that indicates: Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit

What causes a P1879 error code?

The most common causes of P1879 include: Pressure solenoid valve malfunction; Open or short circuit in control circuit; Wiring Harness Problems; Hydraulic system contamination.

How do I fix a P1879 diagnostic trouble code?

To fix P1879: Check the condition of the wiring harness and connectors. Check the resistance of the solenoid valve. Clean or replace pressure valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1879?

Do not drive — repair immediately

How much does it cost to fix P1879?

The estimated repair cost for P1879 is $28–133. Actual cost depends on your vehicle, location, and labor rates.

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