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.
Fuel Injector Heater Control Module
The fuel injector heater control module supplies direct battery voltage to the individual fuel injector heaters. The fuel injector heater ON time varies depending on ambient and engine coolant temperatures. The PCM may activate the fuel injector heaters any time the engine is running during cold ambient temperatures. The PCM monitors the fuel injector heater functionality and control. If a concern is present, a DTC will set. For additional information, refer to COLD START SYSTEM .
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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.