Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble understanding the signals from a switch that helps the car go faster when you press the gas pedal hard. It's like when a light switch flickers on and off instead of staying on.
The kick down switch is part of the transmission system and helps the car downshift when the accelerator is pressed hard. This code indicates that the signal from this switch is not consistent.
The P278E code is triggered when the Engine Control Module (ECM) detects an intermittent or erratic signal from the kick down switch circuit. This switch is responsible for sending signals to the transmission to downshift when the accelerator pedal is pressed aggressively.
• Transmission not downshifting properly
• Poor acceleration
• Check Engine Light illuminated
• Faulty kick down switch
• Wiring issues in the kick down switch circuit
• Poor electrical connections
Kick Down Switch: A switch that signals the transmission to downshift when the accelerator is pressed hard.
ECM: Engine Control Module, the computer that controls the engine and transmission systems.
• Check for any stored trouble codes and freeze frame data.
• Inspect the kick down switch and its wiring for damage.
• Test the kick down switch for proper operation.
• Replace the faulty kick down switch.
• Repair or replace damaged wiring or connectors.
• Clear the trouble codes and test drive the vehicle.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly inspect and maintain the transmission system.
• Ensure electrical connections are secure and free of corrosion.
• Avoid aggressive driving to reduce wear on transmission components.
Sensor Issue
• Drive gently to avoid triggering the issue.
• Have the vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code is less common and typically related to specific driving conditions or wear over time.
Moderate – The vehicle may still be drivable, but performance issues could worsen over time.
Ignoring this code may lead to transmission damage and reduced vehicle performance.
• Vehicle at operating temperature
• Accelerator pedal pressed aggressively
The kick down switch is typically located near the accelerator pedal or integrated into the throttle body.
Q: What happens if I ignore this code?
A: Ignoring this code could lead to further transmission issues and reduced vehicle performance.
Q: Can I drive with this code?
A: Yes, but it is recommended to have the issue diagnosed and repaired to avoid further problems.
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