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P278D Severity
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
The kick down switch tells the transmission when to downshift the transmission so the vehicle can accelerate faster. If the kickdown switch sends an implausible signal to the transmission control module (TCM), code P278D will be stored.
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OBD-II Code Decreased engine performance is defined as a Kick Down Switch Circuit High
The kick down switch tells the transmission when to downshift the transmission so the vehicle can accelerate faster. If the kickdown switch sends an implausible signal to the transmission control module (TCM), code P278D will be stored.