OBD-II code · Powertrain (generic, extended)
P287B Shift Fork A Calibration Not Learned
The TCM has not learned the end-stop calibration for shift fork A. Engagement positions cannot be commanded with full precision until adaptation completes.
Is it safe to drive with P287B?
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 A, Shift Fork Actuator A, Tcm
Related codes
- P288DShift Fork B Calibration Not Learned
- P2878Clutch B Disengagement Time Too Fast
- P2879Clutch B Performance/Stuck Disengaged
- P287AClutch B Stuck Engaged
- P287CTransmission Adaptive Values Not Learned
- P287DElectric/Auxiliary Transmission Fluid Pump Motor Torque Out Of Range
- P287EEngine Disconnect Clutch Actuator Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.