P2291 fault code: Injector Control Pressure Too Low - Engine Cranking

P2291 means “Injector Control Pressure Too Low - Engine Cranking” — an extended powertrain range fault in the powertrain.

Can I DIY?

Professional-only boundary. No verified owner checks for P2291 — recovery or a garage, not home fuel-line work.

Do not DIYReviewed page boundary
ToolsSpecialist equipment

This is the conservative boundary from the reviewed code record. This page has no frozen site-wide safety grade, so it does not publish a repair route.

What to tell the garage about P2291

Do not drive. While the engine is being cranked, injector control pressure is below the computer’s minimum. The engine may not start. Do not crack high-pressure fuel lines; that is workshop work.

Take these reviewed, code-specific details with you. They help the garage confirm the fault without turning this page into a repair procedure.

  • Injector Control Pressure Too Low - Engine Cranking: Registration number
  • Injector Control Pressure Too Low - Engine Cranking: Exact code P2291 and any companion codes
  • Injector Control Pressure Too Low - Engine Cranking: Whether the engine cranks, starts briefly, or will not start
  • Injector Control Pressure Too Low - Engine Cranking: Fuel level and any fuel smell or visible leak
  • Injector Control Pressure Too Low - Engine Cranking: Whether the engine management light is on if it does start
P22xxExtended powertrain range
MOT fail riskif the warning light stays on

What does P2291 mean?

P2291 is a powertrain code from the extended SAE range reported by your car’s engine control unit. It sits in the P22xx block, which covers extended powertrain range. The stored description is “Injector Control Pressure Too Low - Engine Cranking”. The code itself tells you which circuit or system tripped the fault — not always the exact part that failed.

Will P2291 fail an MOT?

If the engine runs with the engine management light on, that lamp is a Major defect at MOT until the fault is repaired and the light stays off. A no-start condition is a roadworthiness problem before it is an MOT lamp issue.

Before booking your test, check what usually fails on your car: see our MOT pass rates by make and model, built from 33.1 million DVSA tests.

Related guides

Car diagnostic test cost: compare the scopeUK booking marketplaces currently publish diagnostic averages of about £52–£65. Engine management light on: steady or flashing?A steady engine management light means the computer has stored a fault. Drive with caution and get the code read. A flashing light is different — stop when it is safe.
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P2291 — quick answers

Is it safe to drive with P2291?

Do not drive. Driveability guidance is not available for this code — treat as do not drive until checked.

Will P2291 fail my MOT?

If the engine runs with the engine management light on, that lamp is a Major defect at MOT until the fault is repaired and the light stays off. A no-start condition is a roadworthiness problem before it is an MOT lamp issue.

Fault-code identifiers are standard diagnostic facts. Their explanations and diagnostic guidance on this site are original editorial summaries, not reproduced SAE wording. MOT defect rules reflect the DVSA MOT inspection manual (2026). This page is general guidance for UK drivers, not a substitute for a professional diagnosis.