Flags a gear shift position signal on circuit A that drops out or jumps for short moments in an automated manual gearbox. The module sees implausible steps or brief losses that are too short or too irregular for a lasting low or high fault. Typical triggers are terminals that lose contact under vibration, a chafed harness moving with the powertrain, or moisture at the actuator connector. No manufacturer documents this code publicly. Patents from Aisin AI and Nissan/Aichi show the shift stroke sensor as the feedback that confirms an engaged gear. CARB requires circuit checks on such inputs. P0914, P0916 and P0917 are the steady electrical faults of circuit A, P0915 the plausibility fault. Shifts may abort or the gearbox may briefly fall back to neutral.
Medium severity. Can I keep driving?Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.
Symptoms
- Warning light comes and goes
- Gear changes abort now and then or the gearbox drops to neutral
- Fault often appears on rough roads or in wet weather
Most likely causes
- Connector at the shift sensor or actuator unit losing contact under vibration
- Chafed or partially broken sensor wire near the gearbox
- Moisture or corrosion in the connector
- Shift position sensor with an internal contact or track fault
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It can trigger limp mode.
- It affects emissions.
What each character of P0918 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 9: Transmission
- 18: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0918?
Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.
What causes code P0918?
The most common causes are: connector at the shift sensor or actuator unit losing contact under vibration; chafed or partially broken sensor wire near the gearbox; moisture or corrosion in the connector.
Related codes
- P0914Gear Shift Position Circuit A
- P0915Gear Shift Position Circuit A Range/Performance
- P0916Gear Shift Position Circuit A Low
- P0917Gear Shift Position Circuit A High
- P0919Gear Shift Position Control Error
- P091AGear Shift Position Circuit B
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.