Fuel Pressure Sensor A - Circuit High
The fuel pressure sensor circuit is reading higher than normal pressure.
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What it means (plain English)
The fuel pressure sensor is telling the computer there's too much pressure in the fuel system; it shouldn't be over 58 psi but it's reporting higher.
What the computer is actually seeing
The engine computer expects a voltage signal between 0.5V to 4.5V from the fuel pressure sensor, indicating normal fuel pressure. If it sees a voltage consistently above 4.5V, it triggers this fault.
What a healthy reading looks like
Normal fuel system pressure ranges from 35 psi to 58 psi, corresponding to sensor voltages of 0.5V to 4.5V.
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 fuel pressure sensor wiring and connectors for damage or corrosion. If any are found, repair as necessary.
- 22. Measure the fuel pressure using a gauge. If it's above 58 psi, further diagnose the fuel system (e.g., check fuel pump and filter).
- 33. Disconnect the fuel pressure sensor and measure the voltage at the connector while turning the ignition on (engine off). If it's above 4.5V, there's a wiring issue or the PCM may be faulty.
- 44. If all checks are normal, replace the fuel pressure sensor and recheck the code.
Common causes
- Faulty fuel pressure sensor
- Damaged wiring or connectors to the sensor
- Issues with the fuel pump excessive pressure
- Clogged fuel filter
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best not to drive the vehicle as excessive fuel pressure can lead to engine damage or fuel leaks.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return.
Why does this code pair with SPN 1340?
SPN 1340 indicates a low circuit input, making 1343 common as both indicate problems with the fuel pressure sensor.
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