P05CA
Economy Mode Switch Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace the economy mode switch if it is faulty.
- Inspect and repair any damaged or loose wiring in the economy mode switch circuit.
- Check and reset the vehicle's computer system to clear any error codes related to the economy mode switch.
- Verify and adjust the economy mode switch settings to ensure proper functionality.
Common causes
Most likely first
- Malfunctioning economy mode switch
- Faulty wiring or connectors in the circuit
- Issues with the economy mode switch control module
- Electrical problems, such as a short circuit or open circuit
- Possible issues with the vehicle's battery or power supply
How to diagnose & fix
Work through it in order
- Engine not starting or difficulty starting
- Poor engine performance or reduced power
- Malfunction indicator lamp (MIL) or check engine light illuminated
- Reduced fuel efficiency or higher fuel consumption
- Transmission shifting issues or failure
Read & clear P05CA yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.