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 MANUALSDODGE AND RAM20241500 TRXREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 198 (ELECTRONIC CONTROL MODULES (SERVICE INFORMATION) - 1500 (1 OF 2))CONTROL UNIT, DEF HEATERDESCRIPTION

2024 Dodge and Ram 1500 TRX

Control Unit, Def Heater: Description

2024 Dodge and Ram 1500 TRXSECTION Description

WARNING: This page is about a different car, the 2023 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of CHRYSLER GROUP, LLC

The Diesel Exhaust Fluid (DEF) Heater Control Unit (HCU) (2) is located on the left side near the brake booster.

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.