Fuel Pressure Sensor Out of Range
The fuel pressure sensor is reporting an out-of-range pressure value.
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What it means (plain English)
The fuel pressure sensor measures the pressure in the fuel system, and it’s sending a value that’s too high or too low compared to what the engine expects.
What the computer is actually seeing
The engine control module (ECM) is receiving fuel pressure data that falls outside of the normal operating range, typically below 5 volts or above 0.5 volts if it's a 0-5V sensor.
What a healthy reading looks like
Fuel pressure should be between 30-70 PSI during normal operation, with a typical sensor output between 0.5V (low pressure) and 4.5V (high pressure).
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. Check the wiring and connector to the fuel pressure sensor for damage or corrosion. Repair as necessary. Decision Point: if repaired, clear codes and retest; if not, continue to next step.
- 22. Verify fuel pressure using a gauge. Ideal fuel pressure should be between 30-70 PSI. Decision Point: if out of spec, check pump and filter; if within spec, continue to next step.
- 33. Inspect the sensor output voltage using a multimeter. Expected output voltage with key on engine off should be approximately 0.5V to 4.5V depending on pressure. Decision Point: if out of range, replace the sensor; if within range, check for ECM issues.
Common causes
- Faulty fuel pressure sensor
- Wiring issues (shorts or opens)
- Blocked fuel filter
- Fuel pump malfunction
- Vacuum leak in the fuel system
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
It’s not recommended to drive long distances, as low fuel pressure can cause the engine to stall.
Will this problem happen again after fixing?
If the root cause (like a faulty sensor or bad wiring) is addressed, it shouldn’t reoccur.
Why did this code pair with SPN 1364?
SPN 1364 indicates the fuel rail pressure is too low, often linked to issues from the fuel pressure sensor.
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