P1778

Step Motor Function

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Gear shifting problems
Hard or abrupt shifts
Delays when shifting gears
Switching to emergency mode of the gearbox
Check Engine Light Illuminates

Causes

Stepper motor fault
Problems with wiring or connectors
Low or contaminated transmission fluid
Mechanical problems in the gearbox
Transmission control module (TCM) malfunction

How to Fix

Check the level and condition of the transmission fluid
Diagnose stepper motor electrical circuits
Check connectors and wiring for damage
Test the operation of the stepper motor
If necessary, replace the stepper motor

Related codes

P1777 P1779 P1780

Error P1778 by Vehicle Brand

Jaguar Volkswagen