Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2020CIVIC SI, 4D SEDANREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSSECURITY SYSTEM / KEYLESS ENTRY SYSTEM - GEN INFO & TROUBLESHOOTINGSYMPTOM TROUBLESHOOTING INDEX FOR VIEWERTHE MODE CHANGES BETWEEN ACCESSORY AND ON, BUT IT DOES NOT CHANGE TO OFF
2020 Honda Civic Si, 4D Sedan
The mode changes between ACCESSORY and ON, but it does not change to OFF
2020 Honda Civic Si, 4D SedanSECTION The mode changes between ACCESSORY and ON, but it does not change to OFF
Diagnostic procedure
- Check the body control module
- Check the park pin switch
- Check the transmission range switch *1
Also check for
- Body control module
- ATP-P line open *1
- Transmission range switch *1
- Park pin switch *1
- P-PIN SW line open *1
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.