OBD Guide

P091B

Gear Shift Position Circuit B Range/Performance

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

Symptoms

  • Incorrect display of the current gear on the instrument panel
  • Difficulty shifting gears
  • The gearbox goes into emergency mode
  • Check engine light comes on
  • Loss of power or jerking when shifting

Causes

  • Gear shift position sensor malfunction
  • Open or short circuit in wiring
  • Poor contact in sensor circuit connectors
  • Problems with the transmission control module
  • Mechanical damage to the shift lever or its fastenings

How to Fix

  1. Check the condition of the gear shift position sensor
  2. Inspect the integrity of the wiring and connectors in the sensor circuit
  3. Check the power supply and signal voltages at the sensor
  4. Calibrate the position sensor (if provided)
  5. If necessary, replace the gearshift position sensor

Related codes

Error P091B by Vehicle Brand