AutoCodes – Generic – P280B

P280B Code - Transmission Range Sensor 'B' Circuit Not Learned

Quick Answer

The Engine Control Module (ECM) monitors the Transmission Range Sensor Circuit. Common causes include Faulty Transmission Range Sensor, Transmission Range Sensor harness is open or shorted, Transmission Range Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P280B indicates Transmission Range Sensor 'B' Circuit Not Learned.
Common causes: Common causes include Faulty Transmission Range Sensor, Transmission Range Sensor harness is open or shorted, Transmission Range Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,085

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P280B Description

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 out of factory specifications.

OBDII Code P280B - Transmission Range Sensor 'B' Circuit Not Learned - AutoCodes.com — P280B Code - Transmission Range Sensor 'B' Circuit Not Learned

What does this mean?

What are the Possible Causes of the DTC P280B?

Faulty Transmission Range Sensor
Transmission Range Sensor harness is open or shorted
Transmission Range Sensor circuit poor electrical connection

How to Fix the DTC P280B?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P280B code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.