P2802 code meaning
Transmission Range Sensor B Circuit Low
Powertrain system Generic code P28xx codes Check engine light
What P2802 means
P2802 means the B signal of the range sensor sits too low, usually a ground short or a duty cycle collapsing toward zero. GM's tables for 2020 and 2025 place the check in the engine module, which reads internal range sensor B on its own wire: a circuit impedance under 0.5 ohm to ground for 0.5 s within a one-second window sets the code as Type A, MIL in the first trip. Ford's 2024 summary sets it (P2800_84) on its six- and ten-speed automatics when the duty cycle drops below 8 %. Ford's hybrid sedans and the C-Max showed P2802 alongside P2800 once water had entered connectors (SSM 47790). P2803 is the high fault and P0707 the matching low fault of sensor A.
P2802 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 P2802
- MIL or wrench lamp on
- No start in Park, missing gear indication
- Stop-start or shift functions restricted
Common causes of P2802
- Most likelySignal wire of sensor B shorted to ground
- PossibleWater or corrosion in a connector of the circuit
- PossibleRange sensor output stage failed low
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 P2802 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. |
| 02 | The exact fault in that area. |
What to do next
- Note P2802 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 P2802
What does P2802 mean?
P2802 means "Transmission Range Sensor B Circuit Low". P2802 means the B signal of the range sensor sits too low, usually a ground short or a duty cycle collapsing toward zero. It is a generic code, so it means the same on every make.
Is it safe to drive with P2802?
Drive gently and only to a workshop. With P2802 the car can go into limp mode (reduced power) to protect itself.
Will P2802 fail an emissions test?
Yes, it can. P2802 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 P2802 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2802 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.