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 VIEWERCANNOT SELECT ON MODE WITH KEYLESS ACCESS AND WITH THE KEYLESS REMOTE TOUCHING THE ENGINE START/STOP SWITCH

2020 Honda Civic Si, 4D Sedan

Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch

2020 Honda Civic Si, 4D SedanSECTION Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch

Diagnostic procedure

Also check for

Check the No. A1-7 (125 A), No. A1-5 (30 A), No. A2-2 (30 A), No. A2-4 (60 A), and No. A18 (10 A) fuses in the under-hood fuse/relay box
Check the No. B30 (10 A) fuse in the under-dash fuse/relay box
Poor connections at the body control module
Keyless remote
Body control module
Electric steering lock *2
Engine start/stop switch
Harness/connections

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.