OBD Guide

P26AE

Engine Coolant Bypass Valve B Control Circuit High

P26AE is an OBD-II diagnostic trouble code meaning: Engine Coolant Bypass Valve B Control Circuit High. Common causes: short circuit to power in the control circuit, coolant bypass valve b malfunction. 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 comes on
  • Unstable engine operation
  • Engine overheating
  • Reduced cooling system efficiency

Causes

  • Short circuit to power in the control circuit
  • Coolant Bypass Valve B Malfunction
  • Wiring harness damage
  • Problems with the ECU
  • Corrosion or poor contact in connectors

How to Fix

  1. Check control circuit for short circuit
  2. Test Coolant Bypass Valve B
  3. Inspect the wiring harness and connectors for damage
  4. Check the operation of the computer
  5. Replace faulty components

Related codes

Error P26AE by Vehicle Brand

FAQ

What does the P26AE code mean?

P26AE is an OBD-II diagnostic trouble code that indicates: Engine Coolant Bypass Valve B Control Circuit High

What causes a P26AE error code?

The most common causes of P26AE include: Short circuit to power in the control circuit; Coolant Bypass Valve B Malfunction; Wiring harness damage; Problems with the ECU.

How do I fix a P26AE diagnostic trouble code?

To fix P26AE: Check control circuit for short circuit. Test Coolant Bypass Valve B. Inspect the wiring harness and connectors for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P26AE?

Limited driving only, diagnose soon

How much does it cost to fix P26AE?

The estimated repair cost for P26AE is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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