OBD Guide

P278E

Kick Down Switch Circuit Intermittent/Erratic

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect gear shifting during sudden acceleration
  • Delayed response to the gas pedal
  • Check Engine Light Is On
  • The car does not downshift during kickdown

Causes

  • Faulty kickdown switch
  • Open or short circuit in the circuit
  • Poor contact in connectors
  • Wiring harness damage
  • Transmission ECU problems

How to Fix

  1. Check the condition of the kickdown switch
  2. Inspect the chain for damage
  3. Check contacts in connectors
  4. Test circuit resistance
  5. If necessary, replace the kickdown switch

Related codes

Error P278E by Vehicle Brand