OBD Guide
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P179D

Coolant Oil Valve Electrical Fault

P179D is an OBD-II diagnostic trouble code meaning: Coolant Oil Valve Electrical Fault. Common causes: open or short circuit in valve circuit, oxidized or damaged connector pins. Estimated repair cost: $17–56.

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

Symptoms

  • Check Engine Light Is On
  • Possible fluctuations in engine temperature
  • Reduced engine efficiency
  • Increased fuel consumption
  • In some cases - noise from the cooling system

Causes

  • Open or short circuit in valve circuit
  • Oxidized or damaged connector pins
  • Solenoid valve malfunction
  • Problems with the engine control unit
  • Wiring harness damage

How to Fix

  1. Check valve circuit integrity
  2. Inspect and clean connector contacts
  3. Check valve resistance
  4. Replace valve if necessary
  5. Check the operation of the system after repair

Related codes

P179EP179FP179C

FAQ

What does the P179D code mean?

P179D is an OBD-II diagnostic trouble code that indicates: Coolant Oil Valve Electrical Fault

What causes a P179D error code?

The most common causes of P179D include: Open or short circuit in valve circuit; Oxidized or damaged connector pins; Solenoid valve malfunction; Problems with the engine control unit.

How do I fix a P179D diagnostic trouble code?

To fix P179D: Check valve circuit integrity. Inspect and clean connector contacts. Check valve resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P179D?

Limited driving only, diagnose soon

How much does it cost to fix P179D?

The estimated repair cost for P179D is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat