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.
Computer/Controls - TCL OFF Indicator Comes On with MIL
2004 Mitsubishi Galant V6-3.8L (6G75)SECTION Computer/Controls - TCL OFF Indicator Comes On with MIL
SOURCE: Mitsubishi Tech Talk Article August 2004
TITLE: TCL OFF Indicator Comes On with MIL
APPLIES To: 2004 Galant, 2004-2004.5 Endeavor
SERVICE TIP:
The TCL OFF indicator and MIL both turn on when the engine ECU sets a misfire or fuel-related DTC. However, this does NOT indicate a TCL concern. This is a normal function of the CAN system. Diagnose the engine or fuel DTC, make the appropriate repairs, then erase DTC U1120 from the TCL ECU.
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.