P278D

Kick Down Switch Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Lack of response to kickdown (sharp acceleration)
Incorrect operation of the automatic transmission
Check Engine Light Illuminates
Reduced engine power
The car goes into emergency mode

Causes

Short circuit in kickdown switch circuit
Kickdown switch malfunction
Wiring harness damage
Problems with contacts in connectors
Engine control unit malfunction

How to Fix

Check the continuity of the kickdown switch circuit
Test the operation of the kickdown switch
Inspect and, if necessary, replace damaged wires
Clean or replace oxidized contacts in connectors
If necessary, replace the kickdown switch

Related codes

P278C P278E P278F