A P0732 code in your 2019 Audi Q5 indicates that the transmission control module has detected an incorrect ratio specifically in second gear. The input/output speed relationship doesn't match what second gear should produce. Your Q5 uses a 7-speed S tronic dual-clutch transmission, which handles gears differently than conventional automatics.
Second Gear in the S tronic
The S tronic uses two clutches—one for odd gears (1, 3, 5, 7) and one for even gears (2, 4, 6). Second gear operates on the even-gear clutch. P0732 could indicate issues with this clutch pack, the synchronizers, or the gear engagement mechanism for second gear.
Dual-Clutch Specific Concerns
Dual-clutch transmissions are more sensitive to clutch wear patterns than conventional automatics. Second gear sees significant use in urban driving, potentially leading to accelerated wear. The mechatronic unit controlling shift actuators can also cause engagement issues that appear as ratio problems.
Common Causes
Even-gear clutch pack wear affecting second gear engagement. Mechatronic unit issues with second gear actuation. Synchronizer wear in second gear. Shift fork problems preventing proper gear engagement. Speed sensor issues specific to second gear calculation. Low or degraded transmission fluid affecting clutch operation.
Symptoms in Your Q5
Slipping during second gear acceleration. Harsh or jerky 1-2 or 2-3 shifts. Second gear may not engage properly, causing skip-shift behavior. Warning lights and limp mode may activate. You might notice second gear feels different from other gears—weaker or delayed engagement.