P280A – Transmission Range Sensor “A” Circuit Not Learned

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P280A Possible Causes

  • Faulty transmission range sensor
  • Transmission range sensor harness is open or short-circuited
  • Transmission range sensor circuit poor electrical connection

How to Fix Code P280A

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check engine light on (or service engine soon warning light)

P280A Meaning

The engine control module (ECM) monitors the transmission range sensor circuit. The ECM sets the OBDII code when the transmission range sensor circuit signal is outside factory specifications.

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