Fuel Pressure Sensor #1 Out of Range
Fuel pressure reading is either too high or too low.
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What it means (plain English)
The fuel pressure sensor is telling the engine control module (ECM) that the fuel pressure is not within the expected range, meaning it could be too low or too high for proper engine operation.
What the computer is actually seeing
The ECM monitors the voltage signal from the fuel pressure sensor, which should typically be between 0.5V (low pressure) and 4.5V (high pressure).
What a healthy reading looks like
Normal fuel pressure should range between 300-500 kPa; voltages should read 0.5V to 4.5V from the sensor to indicate proper operation.
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 connectors to the fuel pressure sensor for any signs of damage or corrosion. Repair as needed. Decision point: Are the connections good? If no, fix connections and retest. If yes, proceed to next step.
- 22. Verify the fuel pressure with a gauge. Connect the gauge to the test port and compare the reading to the expected values. Decision point: Is the fuel pressure within 300-500 kPa? If no, investigate the fuel pump and lines. If yes, proceed to check the sensor.
- 33. Measure the voltage at the fuel pressure sensor connector while the engine is running. It should read between 0.5V and 4.5V. Decision point: Is the voltage within range? If no, replace the fuel pressure sensor. If yes, check ECM input for faults.
Common causes
- Faulty fuel pressure sensor
- Clogged fuel filter
- Weak fuel pump
- Leaking fuel line
- Electrical issues (wiring or connectors)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It could lead to drivability issues like stalling or poor performance; address it soon.
Will this code come back after clearing it?
If the underlying issue isn't resolved, yes, it will reoccur.
Why does it sometimes pair with other codes?
Multiple codes might indicate a common issue affecting fuel delivery or sensor performance.
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