Powertrain
Definition only
Lights the check engine lamp
P2800: Transmission Range Sensor B Circuit (PRNDL Input)
Standardized SAE J2012 code · P28xx codes
What does P2800 mean?
The TCM detects an invalid PRNDL signal pattern from transmission range sensor B. The selected gear position cannot be determined reliably from the B-channel.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
- High Range switch contact array failed
- Medium Open or short in PRNDL wiring
Likelihood is a general estimate across vehicles; your make and model may differ.
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