What P2805 means
The two range sensor channels A and B do not agree on the same gear selector position.
How the engine computer detects it
Plausibility check fails after debounce.
Written from public technical sources and not yet checked by a mechanic. How we write these pages
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
- One sensor mechanically misaligned Most likely
- Aged switch contacts on one channel Possible
How to diagnose P2805
- Read every stored code with an OBD-II scanner. If misfire or fuel trim codes are there too, fix those first: they often cause this one.
- Inspect the parts involved: transmission range sensor a, transmission range sensor b, tcm.
- Work through the causes above from most to least likely, cheapest checks first.
- Clear the code and drive a full drive cycle to confirm the repair held.
Reading the code
- P
- Powertrain
- 2
- Generic (SAE) code
- 805
- Specific fault
Questions drivers ask
Can I drive with code P2805?
If the car shifts normally, drive gently to a shop. If it's stuck in one gear, slips, shifts harshly or won't move out of Park, don't drive it: have it towed.
This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.