P05C8
Economy Mode Switch Circuit Range/Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check the economy mode switch and ensure it is functioning properly
- Inspect the wiring and connectors related to the economy mode switch
- Verify the economy mode switch circuit for any shorts or open circuits
- Perform a diagnostic scan to identify any related trouble codes or issues
- Consult the car or motorcycle's owner manual and manufacturer for specific troubleshooting steps related to the economy mode switch circuit.
Common causes
Most likely first
- Faulty economy mode switch
- Loose or damaged wiring in the economy mode switch circuit
- Faulty engine control module (ECM)
- Issues with the vehicle's battery or electrical system
- Faulty torque converter clutch solenoid
How to diagnose & fix
Work through it in order
- Engine hesitations or stalling
- Reduced power and acceleration
- Increased fuel consumption
- Illuminated Check Engine Light
- Difficulty starting the vehicle
Read & clear P05C8 yourself
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