P2BB1

Alternative Fuel Consumption Too High

Moderate severity

The AFCM detects that alternative fuel consumption exceeds the expected value for the active operating mode. Indicates injector leakage, fuel pressure too high, or unmetered fuel loss.

Common causes

Alt fuel injector leaking
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $220-1980
Fuel rail pressure above target
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $220-1980
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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 P2BB1 mean?

P2BB1 means "Alternative Fuel Consumption Too High". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2BB1?

alt fuel injector leaking; fuel rail pressure above target — 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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