P0705 P0xxx · Powertrain (P) High severity
Transmission Range Sensor Circuit Malfunction (PRNDL Input)
The ECU cannot determine which gear the selector is in, or sees an implausible combination. The vehicle may refuse to start or start in any position.
Severity guidance: High — stop driving and diagnose now; risk of further damage
Symptoms you will notice
- Starts in gear or will not start at all
- Gear display wrong or blank
- Reverse lights incorrect
- Limp mode
Common causes
Ordered from most to least likely — start at the top.
- 1 Misadjusted or failed range/neutral safety switch
- 2 Selector linkage worn or loose
- 3 Corroded connector or wiring
- 4 Water ingress in the switch
How to diagnose it
Cheapest and least invasive first — most of these codes are not a parts problem.
- ✓ Compare the displayed gear with the actual lever position in live data across all positions.
- ✓ Check the linkage for wear or maladjustment before replacing the switch.
- ✓ Inspect the connector for water or corrosion.
- ✓ Adjust the switch to the manufacturer's procedure and re-test.
Repair options
- Adjust or replace the range sensor
- Repair or adjust the linkage
- Repair the wiring or connector
P0705 — frequently asked questions
Why is it a safety issue? +
A wrong range signal can let the engine crank while in gear, or prevent starting when in park.
Can adjustment fix it? +
Often yes. Always verify adjustment before buying a sensor.
Confirm the diagnosis before you buy parts
Send us the code, freeze-frame data and the vehicle — our engineers will tell you what to test first.