MechanicDB
Fault Family System: Powertrain (P-Codes) 29 SAE Codes

Transmission Stuck Unable To Engage Gear

Diagnostic & Technical Explanation
Code P072A (Stuck in Neutral) sets when the TCM commands a gear (or Park/Neutral/Reverse/Drive) and shaft-speed feedback shows the transmission mechanically remained in, or could not leave, a given gear position. Causes are a stuck valve body spool valve, a seized shift fork/linkage, a failed shift solenoid, or severe internal mechanical damage (broken band, planetary, or clutch pack).

These 29 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 29 times.

Codes in this family (29)

CodeDefinitionRepair coverage
P072AStuck in Neutral4 ranked fixes
P072BStuck In Reverse4 ranked fixes
P072CStuck in Gear 14 ranked fixes
P072DStuck in Gear 24 ranked fixes
P072EStuck in Gear 34 ranked fixes
P072FStuck in Gear 44 ranked fixes
P073AStuck in Gear 54 ranked fixes
P073BStuck in Gear 64 ranked fixes
P073CStuck in Gear 74 ranked fixes
P073DUnable to Engage Neutral4 ranked fixes
P073EUnable to Engage Reverse4 ranked fixes
P073FUnable to Engage Gear 14 ranked fixes
P074AUnable To Engage Gear 24 ranked fixes
P074BUnable To Engage Gear 34 ranked fixes
P074CUnable To Engage Gear 44 ranked fixes
P074DUnable To Engage Gear 54 ranked fixes
P074EUnable To Engage Gear 64 ranked fixes
P074FUnable To Engage Gear 74 ranked fixes
P07D7Stuck in Gear 84 ranked fixes
P07D8Unable To Engage Gear 84 ranked fixes
P07E4Unable to Engage Park4 ranked fixes
P07E5Unable to Engage Drive4 ranked fixes
P07E6Stuck in Park4 ranked fixes
P07E7Stuck in Drive4 ranked fixes
P07F8Stuck in Gear 94 ranked fixes
P07F9Unable to Engage Gear 94 ranked fixes
P07FBStuck in Gear 104 ranked fixes
P07FCUnable to Engage Gear 104 ranked fixes
P07FEStuck In Gear - Not Specified4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: