OBD-II code · Powertrain (generic, extended)
P288D Shift Fork B Calibration Not Learned
The TCM has not learned the end-stop calibration for shift fork B. Engagement positions cannot be commanded with full precision until adaptation completes.
Is it safe to drive with P288D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAdaptation lost after battery disconnect or TCM reset
- PossibleShift fork replaced without learn procedure
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Shift Fork B, Shift Fork Actuator B, Tcm
Related codes
- P287BShift Fork A Calibration Not Learned
- P288APark Lock/Pawl Actuator Circuit High
- P288BPark Lock/Pawl Actuator Circuit Performance
- P288CEngine Disconnect Clutch Actuator Control Circuit Driver Current/Temperature Too High
- P288EShift Fork "A" Actuator Control Circuit Driver Current/Temperature Too High
- P288FShift Fork "B" Actuator Control Circuit Driver Current/Temperature Too High
- P2890Cylinder 1 Ion Current Sense Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.