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 MANUALSHYUNDAI2005ELANTRA GLS, 4D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXIMMOBILIZER CONTROL SYSTEM DTCS

2005 Hyundai Elantra GLS, 4D Hatchback, Automatic

Immobilizer Control System DTCS

2005 Hyundai Elantra GLS, 4D Hatchback, AutomaticSECTION Immobilizer Control System DTCS

IMMOBILIZER CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC No.	Detection item
P1610	No answer from SMARTRA Invalid message from SMARTRA to ECM
P1800	Antenna coil error
P1801	Invalid transponder data Programming error
P1803	Invalid request from engine ECM or corrupted data
P1805	Inconsistent data of EEPROM Invalid write operation to EEPROM Not plausible immobilizer indicator stored in the ECM No valid data from SMARTRA after 3 attempts by ECM Invalid tester message or unexpected requests by tester

RENDER: 1.0x

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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.