C0387

Unable To Perform Shift

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–333 (est.)

Symptoms

The car does not change gears
The gearbox goes into emergency mode
Check Engine light comes on

Causes

Shift solenoids malfunction
Electrical circuit problems (harness, connectors)
Low or contaminated automatic transmission oil
Malfunction of speed or gear position sensors
Mechanical failure inside the gearbox

How to Fix

Check the level and condition of the oil in the automatic transmission
Diagnose the gearshift solenoids
Check the integrity of the wiring harness and connectors
Diagnose speed and gear position sensors
If necessary, replace faulty components

Related codes

P0700 P0715 P0720