Fuel Pressure Sensor/Transducer Failure
Indicates a fault with the fuel pressure sensor signal.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The fuel pressure sensor is either not sending a signal, sending the wrong signal, or is dead altogether, impacting fuel delivery performance.
What the computer is actually seeing
The Engine Control Module (ECM) expects a voltage signal from the fuel pressure sensor that typically ranges from 0.5V to 4.5V, corresponding to a pressure range of approximately 50 to 300 kPa (7 to 43 psi). If the signal is out of this range or absent, the ECM triggers the code.
What a healthy reading looks like
0.5V to 4.5V signal from the fuel pressure sensor corresponding to 50 to 300 kPa (7 to 43 psi) fuel 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. Start by checking the fuel pressure manually using a gauge; it should be within 50 to 300 kPa (7 to 43 psi). Is the pressure within spec? (Yes: go to step 3; No: fix fuel delivery issues.)
- 22. Inspect the wiring and connectors at the fuel pressure sensor for damage or corrosion. Are they in good condition? (Yes: go to step 3; No: repair wiring/connectors.)
- 33. Check the output voltage at the sensor with the key on/engine off. Is the voltage between 0.5V and 4.5V? (Yes: ECM may be faulty; No: replace the fuel pressure sensor.)
Common causes
- Wiring issues or open circuits in the sensor circuit
- Faulty fuel pressure sensor
- Blocked fuel lines or filters causing pressure anomalies
- ECM software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive as you may not have proper fuel pressure, which can lead to engine performance issues.
Will this code come back after clearing it?
If the underlying issue isn't resolved, the code will likely return.
Why does this code sometimes pair with SPN 697 or SPN 698?
Those codes also relate to fuel pressure problems; they help pinpoint where in the fuel system the fault might lie.
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