Powertrain
generic / SAE
P278D
Kick Down Switch Circuit High
Voltage on the kick-down switch line is above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / 8D
Possible causes
- Open switch contacts high
- Switch wire shorted to B+ medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.3–1.5 h
- Component: kickdown switch
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012