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.
DTC P1432: Fuel Pressure Sensor Signal Low (2.2L - CNG): Description
Fuel Pressure Sensor (FPS) is a potentiometer. Alternate Fuel Engine Control Unit (AF ECU) supplies 5-volt reference voltage and ground circuit to FPS sensor. When fuel level/tank pressure is full, FPS signal voltage increases to 4.1 volts. As fuel level/tank pressure decreases to empty, FPS signal voltage drops to approximately 0.5 volt. AF ECU monitors FPS signal circuit voltage and Fuel Temperature Sensor (FTS) to determine amount of fuel in fuel tank.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.