P278E Fault Code

Kick Down Switch Circuit Intermittent/Erratic

• What does that mean?
• Symptoms
• Causes
• Solutions

The Kick Down Switch Circuit is responsible for signaling the transmission to downshift, allowing for increased power and acceleration when needed. An intermittent or erratic fault in this circuit can lead to unpredictable transmission behavior.

What are the symptoms of the P278E code?

Drivers may experience symptoms such as:

• Unresponsive transmission when pressing the accelerator
• Unexpected downshifts or upshifts during acceleration
• Illuminated check engine light or transmission warning light
• Lag in acceleration when attempting to kick down for more power.

What causes the P278E code?

Common causes of this fault include:

• Faulty kick down switch
• Damaged wiring or connectors in the kick down circuit
• Poor electrical connections that lead to intermittent signals
• Issues with the engine control module (ECM) that affect switch operation.

How to fix P278E?

To resolve this issue, consider the following steps:

• Inspect the kick down switch for operational issues and ensure it is functioning correctly.
• Check wiring and connectors for any signs of wear, corrosion, or damage.
• Clean or repair any poor electrical connections that may cause intermittent signals.
• If necessary, replace the kick down switch or repair any damaged wiring.
• Perform a scan of the vehicle's ECU to clear fault codes after repairs.