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 MANUALSHYUNDAI2009TUCSON LIMITED, 2.0 BREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLESC (ELECTRONIC STABILITY CONTROL) SYSTEMTROUBLESHOOTING FOR DTCC1274 LONGITUDINAL G SENSOR OPEN/SHORTDTC DETECTING CONDITION

2009 Hyundai Tucson Limited, 2.0 B

C1274 Longitudinal G sensor open/short: DTC Detecting Condition

2009 Hyundai Tucson Limited, 2.0 BSECTION DTC Detecting Condition

Item	Detecting Condition	Possible cause
DTC Strategy	Voltage Monitoring	Open or short of G-Sensor circuit. Faulty G-Sensor
Enable Conditions	When the voltage of G sensor signal is >4.5±0.1V or <0.6±0.1V for 250msec continuously.
Fail Safe	ABS/ESC functions are inhibited, EBD function is allowed and the ABS/ESC warning lamps are activated.

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.