OBD Guide

P2801

Transmission Range Sensor B Circuit Range/Performance

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Inability to start the engine
  • Transmission does not shift correctly
  • Check Engine Light Is On
  • The gear selector does not display correctly on the dashboard

Causes

  • Faulty gear range sensor
  • Damage to the wiring or sensor connector
  • Transmission control module (TCM) problems
  • Mechanical damage or contamination of the sensor

How to Fix

  1. Check the integrity of the sensor wiring and connectors
  2. Test the gear range sensor to ensure it meets specifications
  3. Check sensor signals using an OBD-II scanner when moving the selector lever
  4. Replacing the gear range sensor if necessary

Related codes

Error P2801 by Vehicle Brand