OBD Codes List

Diagnostic reference · P280A

P280A

Transmission Range Sensor A Circuit Not Learned

System
Transmission (P code)
Lamp
Check Engine Light
Category
Powertrain - Transmission

What it means

P280A means Transmission Range Sensor A Circuit Not Learned.

Where it lives

For P280A, the sensor sits on the circuit this code reports. The description of P280A reports a fault at the sensor.

Check these first

  • A transmission range sensor A that has never been relearned
  • A failed transmission range sensor A
  • Low battery voltage during the relearn
  • An open or short in the transmission range sensor A circuit

What to do next

  1. Read transmission range sensor A state on a scan tool
  2. Check battery voltage before the relearn
  3. Run the transmission range sensor A relearn procedure
  4. Test the transmission range sensor A circuit for open and short faults
  5. Replace transmission range sensor A if the relearn fails
  6. Clear the code and retest

Look up another code

Enter a full code or a symptom. Press / to search. How to read a code

Type a code above, or start from a symptom or a common code.

Updated

Generic SAE J2012 definition. Last updated 2026-10-10.