P26AC
Engine Coolant Bypass Valve B Control Circuit/Open
P26AC is an OBD-II diagnostic trouble code meaning: Engine Coolant Bypass Valve B Control Circuit/Open. Common causes: broken wires in the control circuit, coolant bypass valve malfunction. Estimated repair cost: $17–56.
Symptoms
- Engine overheating
- The engine takes a long time to warm up
- Unstable engine temperature
- Check Engine Light Is On
- Decrease in interior heater efficiency
Causes
- Broken wires in the control circuit
- Coolant bypass valve malfunction
- Corrosion or poor contact in connectors
- Problems with the control relay
- Engine control unit (ECU) malfunction
How to Fix
- Check the integrity of wires and connections in the control circuit
- Test valve resistance and operation
- Clean connector contacts from corrosion
- Check the operation of the control relay
- Replace the coolant bypass valve if necessary.
Related codes
Error P26AC by Vehicle Brand
FAQ
What does the P26AC code mean?
P26AC is an OBD-II diagnostic trouble code that indicates: Engine Coolant Bypass Valve B Control Circuit/Open
What causes a P26AC error code?
The most common causes of P26AC include: Broken wires in the control circuit; Coolant bypass valve malfunction; Corrosion or poor contact in connectors; Problems with the control relay.
How do I fix a P26AC diagnostic trouble code?
To fix P26AC: Check the integrity of wires and connections in the control circuit. Test valve resistance and operation. Clean connector contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P26AC?
Limited driving only, diagnose soon
How much does it cost to fix P26AC?
The estimated repair cost for P26AC is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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