Fuel Pressure Sensor Voltage Signal Invalid
The fuel pressure sensor signal is out of range or invalid.
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What it means (plain English)
The fuel pressure sensor is not sending a proper signal to the engine control unit (ECU). This can happen if the sensor is damaged, the wiring is corroded, or there's an issue with the fuel system.
What the computer is actually seeing
The ECU expects a fuel pressure signal typically between 0.5V to 4.5V. If the voltage is outside of this range for more than a specified period, it triggers the fault code.
What a healthy reading looks like
Expect fuel pressure to be within 55 to 75 PSI while the engine is running under normal conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors to the fuel pressure sensor for damage or corrosion. Repair if necessary. Decision: Is wiring intact? Yes: Go to step 2; No: Repair wiring and retest.
Common causes
- Faulty fuel pressure sensor
- Damaged wiring or connectors
- Fuel pump issues
- Clogged fuel filter
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances; it may reduce performance or cause stalling.
Will this code come back after clearing?
If the underlying issue isn't fixed, it will likely return.
Why does this code also appear with low fuel pressure codes?
Low fuel pressure often affects the sensor's ability to provide accurate readings.
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