P0705
Transmission Range Sensor A Circuit (PRNDL Input)
Transmission range sensor
Generic OBD-II
High
What it means
P0705 means the transmission range sensor — the switch that tells the computer whether you're in Park, Reverse, Neutral, or Drive — is sending an invalid signal. Because this input also drives the start interlock and shift logic, it can cause a no-start in Park, a wrong gear reading on the dash, and erratic shifting.
High
Can I keep driving? May not start unless the shifter is jiggled or set to Neutral, and shifting can be erratic. Get it fixed before relying on the vehicle.
Common symptoms
What you'll notice
- No crank/no-start in Park (may start in Neutral)
- Wrong gear shown on the dash, or no gear indication
- Harsh, delayed, or wrong-gear shifting
- Transmission defaults to a limp / fail-safe mode
- Check-engine light on
Common causes
Most likely first
- Faulty transmission range sensor (neutral safety / PRNDL switch)Likely
- Misadjusted range sensor or shift linkageCommon
- Damaged or corroded wiring or connector at the sensorCommon
- Failed transmission control moduleLess often
How to diagnose & fix
Work through it in order
- Scan and compare the gear the module reports with the actual shifter position.
- Check the range sensor adjustment and shift linkage alignment first — a common, cheap fix.
- Inspect the sensor's wiring and connector for corrosion or damage.
- Test the sensor's signal through the gear range for dropouts.
- Replace or re-adjust the range sensor as needed. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0705?+
Use caution. The car may refuse to start in Park or shift into the wrong gear, and the safety interlock can behave unpredictably. Have it diagnosed promptly.
Can I just clear P0705?+
It returns until the range sensor or its adjustment is corrected. Because it ties into the start interlock and shift logic, fix the cause rather than clearing it.
Related codes
Often seen with P0705
Read & clear P0705 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX