P2B76

Coolant Heater B Control Circuit/Open

Moderate severity

The control circuit of coolant heater B reports a control circuit/open condition. Auxiliary preheating of the coolant cannot be commanded as expected.

Common causes

Open in heater control wire
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $130-660
Open heater element
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $130-660
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P2B76 mean?

P2B76 means "Coolant Heater B Control Circuit/Open". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2B76?

open in heater control wire; open heater element; pin pushed back out of connector body — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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