P2291 on Ford: Causes, Symptoms and Fix Cost

Quick Answer

Not safe to drive

P2291 on a Ford means the pressure that operates the injectors stayed below the manufacturer's minimum while the engine was cranking, so the engine starts late or not at all. In the SAE wording this is injector control pressure, which on oil-operated (HEUI) diesels such as the Ford 6.0 Power Stroke is engine oil pressurised by a high-pressure oil pump. Makers of common-rail engines that use the code apply it to rail pressure that builds too slowly during cranking, and the exact meaning can differ by manufacturer.

Severity: High · Fuel System
Typical repair cost, all makes: €60-€2500

Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your Ford and Skanyx tells you what P2291 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.

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What does P2291 mean on a Ford?

The Quick Answer above is the generic definition. What follows is the model-specific detail for the Ford models that log P2291.

Ford Super Duty (6.0 Power Stroke V8 diesel)

2003-2007

The 6.0 Power Stroke uses HEUI injectors that are fired by engine oil, pressurised by a high-pressure oil pump and controlled by an injection pressure regulator (IPR) that the engine computer drives. On this engine P2291 therefore points at the oil side first: oil level, the high-pressure oil pump, the IPR and the injectors, not a fuel rail. Reading injector control pressure here needs a Ford-capable scan tool.

What causes P2291 on a Ford?

Beyond the generic causes listed on the main P2291 page, these are the patterns noted for Ford models:

Low engine oil level on the oil-operated injection system
: Ford Super Duty (6.0 Power Stroke V8 diesel)
High-pressure oil pump or IPR valve not building pressure
: Ford Super Duty (6.0 Power Stroke V8 diesel)

How to diagnose P2291 on a Ford with OBD2

Follow these steps to pinpoint the root cause of P2291:

Start with the basics: fuel in the tank, engine oil level and battery condition. Slow cranking from a weak battery lowers the pressure the pump can build
Ask whether the fuel filter was changed or the tank ran dry recently. Air in the fuel system has to be bled the way the service manual describes for that engine
Read the stored code and freeze frame with an OBD2 reader, and check for other rail pressure, injector or crank sensor codes
Watch engine rpm on the reader while cranking. A reading of zero usually means the control unit is not seeing a crank signal, and on most engines that stops injection whatever the pressure
If your reader shows fuel rail pressure, watch it during cranking: it should climb quickly. The minimum needed to start depends on the engine and is in the manufacturer's data. Injector control pressure on HEUI engines and injector leak-off need manufacturer-level software or workshop gauges
Check the pressure sensor and its wiring before condemning the high-pressure pump, because a sensor that reads low sets the same code

How much does P2291 cost to fix on a Ford? (EUR)

Estimated repair costs for P2291 in EUR, compiled across makes. Expect Ford parts and labour towards the upper end of each range.

Repair	Parts Cost	Labor Cost	Total Estimate	DIY Difficulty
Replace fuel filter and bleed the system (diesel)	€20–€60	€40–€100	€60–€160	Moderate
Replace in-tank low-pressure fuel pump	€80–€350	€120–€550	€200–€900	Professional
Replace fuel rail pressure sensor	€30–€130	€30–€90	€60–€220	Moderate
Replace one diesel injector	€150–€450	€100–€200	€250–€650	Professional
Replace high-pressure diesel fuel pump	€600–€1700	€300–€800	€900–€2500	Professional

Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.

These codes are often seen alongside P2291 or point to related issues, on any make:

Looking for the full P2291 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P2291 guide

Diagnose P2291 on your Ford

Your car logged P2291. Skanyx reads it on a standard OBD2 adapter (Bluetooth LE on iPhone), tells you whether it is safe to keep driving, and shows the €60-€2500 repair range so you know the number before a shop quotes you. Free on iPhone and Android, and you do not need to be a mechanic to read it.