P288D

Shift Fork B Calibration Not Learned

Moderate severity

The TCM has not learned the end-stop calibration for shift fork B. Engagement positions cannot be commanded with full precision until adaptation completes.

Common causes

Adaptation lost after battery disconnect or TCM reset
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $60-280
Shift fork replaced without learn procedure
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $60-280
See all causes + fix costs
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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 P288D mean?

P288D means "Shift Fork B Calibration Not Learned". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P288D?

adaptation lost after battery disconnect or tcm reset; shift fork replaced without learn procedure — 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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