P278B OBD-II: Kick Down Switch Circuit Range/Performance
P278B Severity
Will P278B go away on its own?
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.
What causes OBD-II fault code P278B?
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 P278B will be stored.
OBD II Fault Code
- OBD II P278B
OBD-II Code Decreased engine performance is defined as a Kick Down Switch Circuit Range/Performance
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 P278B will be stored.
Decreased engine performance Symptoms
- Decreased engine performance
Common Problems That Trigger the P278B Code
- Kick down switch failure
- Transmission Control Module (TCM) failure
- Wiring issue
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