P2800 code meaning
Transmission Range Sensor B Circuit (PRNDL Input)
Powertrain system Generic code P28xx codes Check engine light
What P2800 means
P2800 is the general circuit code for the second signal path that tells the modules which selector position (P, R, N, D, L) is engaged. It applies when that signal is unusable without a clear low, high or frequency pattern. Ford's 2019 hybrid OBD summary lists it for the eCVT range sensor with the wrench lamp and no MIL, judged in under a second; one section also sets it when the gear position message from the engine module over CAN is invalid. Ford's 2024 summary uses P2800 as the base number for its TRS B sub-faults. Ford message SSM 47790 ranks P2800 among the most frequent codes on Fusion, MKZ and C-Max hybrids built 2013-2019, caused by water or corrosion in several connectors. Sensor A has P0705.
P2800 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2800
- Wrench lamp or MIL on, gear display missing or wrong
- Engine does not start in Park or Neutral
- Trouble selecting a drive position
Common causes of P2800
- Most likelyWater entry or corrosion in connectors along the sensor circuit
- PossibleChafed or broken wiring between sensor and module
- PossibleFailed transmission range sensor
- Less likelyInvalid gear position message from another module over CAN
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission range sensor bWiring harnessTCM
What each part of P2800 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8 | Area: transmission. |
| 00 | The exact fault in that area. |
What to do next
- Note P2800 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2800
What does P2800 mean?
P2800 means "Transmission Range Sensor B Circuit (PRNDL Input)". P2800 is the general circuit code for the second signal path that tells the modules which selector position (P, R, N, D, L) is engaged. It is a generic code, so it means the same on every make.
Is it safe to drive with P2800?
Drive gently and only to a workshop. With P2800 the car can go into limp mode (reduced power) to protect itself.
Will P2800 fail an emissions test?
Yes, it can. P2800 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2800 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2800 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.