P2B86
Coolant Pump A Overspeed/Air in System
P2B86 is an OBD-II diagnostic trouble code meaning: Coolant Pump A Overspeed/Air in System. Common causes: coolant pump malfunction, air lock in the cooling system. Estimated repair cost: $56–167.
Symptoms
- Engine overheating
- Unstable engine operation
- Coolant leak
- Coolant pump noise
- Check engine light comes on
Causes
- Coolant pump malfunction
- Air lock in the cooling system
- Damage to pump wiring or connectors
- Pump control module malfunction
- Low coolant level
How to Fix
- Check the coolant level and add if necessary
- Remove air from the cooling system
- Check the coolant pump for damage
- Check the wiring and connectors of the pump
- Replace the coolant pump if necessary
Related codes
Error P2B86 by Vehicle Brand
FAQ
What does the P2B86 code mean?
P2B86 is an OBD-II diagnostic trouble code that indicates: Coolant Pump A Overspeed/Air in System
What causes a P2B86 error code?
The most common causes of P2B86 include: Coolant pump malfunction; Air lock in the cooling system; Damage to pump wiring or connectors; Pump control module malfunction.
How do I fix a P2B86 diagnostic trouble code?
To fix P2B86: Check the coolant level and add if necessary. Remove air from the cooling system. Check the coolant pump for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2B86?
Do not drive — repair immediately
How much does it cost to fix P2B86?
The estimated repair cost for P2B86 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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