OBD Guide

P26C1

Engine Coolant Bypass Valve D Range/Performance

P26C1 is an OBD-II diagnostic trouble code meaning: Engine Coolant Bypass Valve D Range/Performance. Common causes: coolant bypass valve malfunction, valve control circuit problems. Estimated repair cost: $17–56.

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

Symptoms

  • Unstable engine temperature
  • Engine overheating
  • Reduced engine efficiency
  • Check Engine Light Illuminates
  • Increased fuel consumption

Causes

  • Coolant bypass valve malfunction
  • Valve control circuit problems
  • Cooling system clogged
  • Coolant temperature sensor malfunction
  • Engine control unit software error

How to Fix

  1. Check the condition of the coolant bypass valve
  2. Diagnose the electrical valve control circuit
  3. Clear the cooling system of possible blockages
  4. Check and, if necessary, replace the coolant temperature sensor
  5. Update engine control unit software

Related codes

Error P26C1 by Vehicle Brand

FAQ

What does the P26C1 code mean?

P26C1 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Bypass Valve D Range/Performance

What causes a P26C1 error code?

The most common causes of P26C1 include: Coolant bypass valve malfunction; Valve control circuit problems; Cooling system clogged; Coolant temperature sensor malfunction.

How do I fix a P26C1 diagnostic trouble code?

To fix P26C1: Check the condition of the coolant bypass valve. Diagnose the electrical valve control circuit. Clear the cooling system of possible blockages. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P26C1?

Limited driving only, diagnose soon

How much does it cost to fix P26C1?

The estimated repair cost for P26C1 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat