P2805
Transmission Range Sensor A/B Correlation
Transmission range sensing
Generic OBD-II
High
What it means
P2805 means the transmission's two range (gear-position) sensors don't agree, so the controller can't confirm which gear is selected. Because the start system and shift strategy depend on this, it can cause a no-start, wrong-gear engagement, or limp mode. It's worth fixing before driving.
High
Can I keep driving? Risky — the transmission may not know what gear it's in, which can cause a no-start, wrong-gear engagement, or limp mode. Fix it before relying on the vehicle.
Common symptoms
What you'll notice
- Check-engine light on
- No-crank / no-start in Park or Neutral
- Wrong gear engages, or harsh/unexpected shifts
- Gear-position (PRNDL) display wrong or blank
- Transmission enters limp/failsafe mode
Common causes
Most likely first
- Misadjusted or faulty transmission range (park/neutral) sensorLikely
- The two range-sensor signals disagreeing due to a wiring open or shortCommon
- Corroded or loose connector at the range sensorCommon
- Manual shift linkage out of adjustmentLess often
- Faulty transmission control module (rare)Less often
How to diagnose & fix
Work through it in order
- Scan freeze-frame and compare both range-sensor signals against actual gear position.
- Verify the range sensor is correctly adjusted/aligned to the shift detents.
- Inspect the sensor connector and wiring for opens, shorts, and corrosion.
- Check shift-linkage adjustment.
- Replace or realign the range sensor as indicated; clear and confirm a correct gear readout in every position.
FAQ
Quick answers
Is it safe to drive with P2805?+
Not really. A range-sensor mismatch can stop the engine from cranking or let it start in gear, and can force limp mode. Get it diagnosed promptly.
Can I just clear P2805?+
It resets as soon as the two sensors disagree again; the sensor adjustment or wiring must be corrected.
Related codes
Often seen with P2805
Read & clear P2805 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