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 MANUALSHYUNDAI2014EQUUS SIGNATUREREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM DIAGNOSIS (3 OF 3)DTC U0105: LOST COMMUNICATION WITH FUEL INJECTOR CONTROL MODULEDTC INFORMATIONDTC DETECTING CONDITION

2014 Hyundai Equus Signature

DTC Information: DTC Detecting Condition

2014 Hyundai Equus SignatureSECTION DTC Detecting Condition

Item	Detecting Condition	Possible cause
DTC Strategy	CAN communication status check	IDB faulty CAN communication line between ECM and IDB
EnableConditions	B+ is higher than 10.8V IG "ON" Time greater than 0.5sec.
Threshold value	Duration of communication lost with IDB is higher than 4 sec
Diagnosis Time	Continuous
MIL On Condition	2 driving cycle

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.