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.
Circuit Description
The Fuel Injector Control Module (FICM) monitors the CNG Fuel Tank Pressure (FTP) sensor voltage, the Fuel Tank Temperature (FTT) sensor voltage, and the Fuel Rail Temperature (FRT) sensor voltage. The FTP, FTT, and FRT sensor values, and diagnostic data, is communicated to the Powertrain Control Module (PCM) by 2 Pulse Width Modulated (PWM) circuits. This DTC sets when the PCM does not receive any PWM signals from the FICM.
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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.