Fuel Pressure Sensor Circuit High
The fuel pressure sensor is reading a voltage too high.
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What it means (plain English)
The fuel pressure sensor tells the computer how much fuel pressure is in the system. When it reads higher than it should—typically over 5 volts—it triggers this code.
What the computer is actually seeing
The engine control unit (ECU) expects the fuel pressure sensor to send a voltage between 0.5 and 4.5 volts that corresponds with the fuel pressure. Values above 4.5 volts indicate a fault.
What a healthy reading looks like
0.5 to 4.5 volts from the fuel pressure sensor; normal fuel pressure usually runs from 40 to 60 psi.
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.
- 1Check the fuel pressure sensor wiring and connections for damage or corrosion.
- 2Measure the voltage at the fuel pressure sensor connector; it should be between 0.5-4.5 volts.
- 3If voltage is above 4.5 volts, check for short circuits in the wiring harness.
- 4If wiring is good, perform a fuel pressure test with a gauge to ensure the actual fuel pressure is within specs (40-60 psi).
- 5If fuel pressure is correct and wiring is okay, replace the fuel pressure sensor and retest.
Common causes
- Wiring issues such as short circuits or broken wires to the sensor.
- Faulty fuel pressure sensor.
- Bad ECU or software issue.
- Incorrect fuel pressure due to a failing fuel pump or clogged filter.
Typical repair cost
$$$-$$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but performance may be impacted; fix soon to avoid further issues.
Will this code come back after clearing it?
If the underlying issue is not resolved, it will likely return.
Why does this code pair with SPN 1182?
Both codes are related to fuel pressure monitoring; 1182 usually indicates a low pressure issue.
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