P091A

Gear Shift Position Circuit B

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Incorrect gear shifting
Check Engine light comes on
The gearbox goes into emergency mode
Difficulty shifting gears
Loss of engine power

Causes

Open or short circuit in wiring harness
Shift position sensor malfunction
Poor contact in connectors
Problems with the transmission control unit
Mechanical damage to wiring

How to Fix

Check continuity of circuit B wiring harness
Check the condition of connectors and contacts
Test the shift position sensor
Check the operation of the transmission control unit
Replace damaged components

Related codes

P091B P0919 P0920