P2289 — Fuel injector pressure too high with engine off

The code indicates the fuel injector control pressure sensor is reading higher than expected when the engine is off. This usually means a problem with the sensor itself, wiring issues, or a stuck fuel pressure regulator.

Common causes

The cause is almost always one of a few things. Here they are — P2289 rarely comes from anything outside this list:

• Faulty injector control pressure sensor
• Wiring or connector problems to the sensor
• Stuck or malfunctioning fuel pressure regulator
• Fuel system contamination causing pressure issues

Where to start

In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:

1. Inspect and clean sensor connectors and wiring
2. Test sensor output and replace if faulty
3. Check fuel pressure regulator operation
4. Replace fuel pressure regulator if needed
5. Inspect fuel system for contamination or damage

That is what holds for P2289 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.