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 Tank Temperature Sensor (CNG)
Fuel Tank Temperature (FTT) sensor is a thermistor mounted on CNG fuel tank and is used along with Fuel Tank Pressure (FTP) sensor to calculate fuel density. Compuvalve sends FTT sensor a 5-volt reference signal. FTT sensor is also used to keep fuel gauge from fluctuating during temperature changes. If FTT sensor malfunctions, it will give a constant reading of 59°F (15°C).
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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.