P0915: Gear Shift Position Circuit A Range/Performance

What does P0915 mean?

Plausibility fault of the gear shift position signal on circuit A in an automated manual gearbox. The voltage stays within its electrical limits, but the reading does not fit: the signal does not change while the shift actuator moves, or the engaged position does not match the learned gear positions. No manufacturer documents this code in freely citable material. A Nissan/Aichi patent points out that sensor brackets on shift forks can deform under vibration and spoil the reading, and an Aisin AI patent describes the fallback when a stroke sensor can no longer be trusted. CARB requires rationality checks on such inputs. P0914, P0916 and P0917 are the electrical faults, P0919 a shift movement that misses its target. Shifting becomes limited or stops.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine or transmission warning light on
• Gearbox drops to neutral while driving
• Gears refused or engaged only after a delay

Common causes

• High Worn or drifting shift position sensor, redundant tracks disagree
• Medium Bent sensor bracket or displaced magnet on the shift rod
• Medium Gear positions not relearned after actuator or TCM replacement
• Low High resistance at connector pins distorting the signal

Likelihood is a general estimate across vehicles; your make and model may differ.