P0916Gear Shift Position Circuit A Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Set when the gear shift position signal on circuit A of an automated manual gearbox stays below its lowest valid value for longer than a calibrated time. A short to ground on the signal line, a lost sensor supply or an internal sensor defect are the usual causes; depending on the sensor design a broken signal wire reads low as well. No manufacturer documents this code publicly. In the patents of Aisin AI and Nissan/Aichi the shift stroke or shift position sensor is the only feedback telling the controller whether a gear is engaged, so a missing signal stops automatic shifting. CARB requires out-of-range checks on such inputs. P0917 is the matching high fault, P091C and P095C are the low faults of circuits B and C. The gearbox typically locks gear changes or drops to neutral.
- What you may notice
- Check engine or transmission warning light on
- No gear changes possible or gearbox stays in neutral
- Engine may not start because neutral cannot be confirmed
- Likely causes
- LikelySignal wire chafed through and shorted to ground
- PossibleSensor reference supply interrupted or shorted
- PossibleInternal defect of the shift position sensor
- RareFaulty input stage in the transmission control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.