P278C Code - Kick Down Switch Circuit Low
Quick Answer
The P278C diagnostic trouble code (DTC) refers to the Kick Down Switch Circuit Low. Common causes include Faulty kick-down switch, Damaged wiring or connectors in the circuit, Malfunctioning transmission control module (TCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P278C indicates Kick Down Switch Circuit Low.
- Common causes
- Common causes include Faulty kick-down switch, Damaged wiring or connectors in the circuit, Malfunctioning transmission control module (TCM).
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P278C Description
The P278C diagnostic trouble code (DTC) refers to the Kick Down Switch Circuit Low. This code is typically found in vehicles with automatic transmissions. The kick-down switch is a component that is activated when the accelerator pedal is fully depressed, signaling the transmission to downshift to a lower gear for increased acceleration. When the kick-down switch circuit is detected to be low, it means that the voltage signal from the switch is below the expected range, indicating a potential issue with the switch or the circuit.
Common Causes of P278C
- Faulty kick-down switch
- Damaged wiring or connectors in the circuit
- Malfunctioning transmission control module (TCM)
- Corrosion or moisture in the circuit
- Electrical issues such as short circuits or open circuits
Symptoms of P278C
- Delayed or sluggish acceleration
- Reduced power output
- Limp mode activation
- Check Engine Light illuminated
- Harsh shifting or erratic transmission behavior
How to Fix P278C
- Begin by using a scan tool to retrieve the DTC and verify the presence of the P278C code.
- Inspect the kick-down switch and its wiring for any visible damage or corrosion. Replace the switch if necessary.
- Check the wiring and connectors in the circuit for any signs of damage or poor connections. Repair or replace as needed.
- Test the TCM for proper operation and communication. Replace the TCM if it is found to be faulty.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P278C
The typical repair costs for addressing a P278C code can vary depending on the specific cause of the issue. In general, replacing a kick-down switch can cost between $50 and $150, while repairing wiring or connectors may range from $100 to $300. If the TCM needs to be replaced, the cost can be higher, typically ranging from $200 to $600. Labor costs at auto repair shops can vary, with hourly rates typically between $80 and $150. It is advisable to check with local shops for a more accurate estimate based on the vehicle make and model, as well as the extent of the repairs needed.
Need more information about the P278C code?
Need more information on how to fix the P278C code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P278C code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P278C Code
No Frequently Asked Questions about P278C Code found.
Discuss the causes and fixes for P278C OBDII Code
Code P278C comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.