Error code
OBD2 P0908
OBD2P0908
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Gate Select Position Circuit Intermittent.
Severity
highAvoid driving as it poses a safety risk due to unpredictable gear shifts.
Summary
P0908 indicates an intermittent malfunction in the transmission gate select position circuit, which can affect gear selection and shift patterns.
Symptoms
- Illuminated warning light
- Transmission may fail to engage all or some gears
- Harsh, erratic, or unpredictable gearshifts
- No-start condition (in some cases)
- Transmission locked in failsafe mode
Common Causes
- Defective transmission gate selector position switch
- Misaligned or poorly adjusted switch
- Damaged wiring and connectors
- Excessive wear in mechanical gear selector linkages
- Rarely, malfunctions within the transmission itself
Diagnosis
- Check for proper alignment and adjustment of the switch
- Inspect wiring for damage, corrosion, or disconnection
- Perform resistance, ground integrity, and continuity tests on circuits
- Replace defective transmission gate selector position switch
Fixes
- Replace the transmission gate selector position switch— $100 to $1000+ depending on labor and parts
FAQ
How do I diagnose P0908?
Start by checking for proper alignment of the switch, inspecting wiring, and performing electrical tests as per manufacturer guidelines.
What if the issue is intermittent?
Wiggle test wires during continuity/resistance testing to induce the fault.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0900Clutch Actuator Circuit/Open
- P0901Clutch Actuator Circuit Range/Performance
- P0902Clutch Actuator Circuit Low
- P0903Clutch Actuator Circuit High
- P0904Gate Select Position Circuit
- P0905Gate Select Position Circuit Range/Performance
- P0906Gate Select Position Circuit Low
- P0907Gate Select Position Circuit High
- P0909Gate Select Control Error
- P0910Gate Select Actuator Circuit/Open
- P0911Gate Select Actuator Circuit Range/Performance
- P0912Gate Select Actuator Circuit Low