OBD Guide
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P3091

Fuel Rail Pressure-Rate-Controlled Minimum Pressure Fallen Below

P3091 is an OBD-II diagnostic trouble code meaning: Fuel Rail Pressure-Rate-Controlled Minimum Pressure Fallen Below. Common causes: fuel pump malfunction, fuel filter clogged. Estimated repair cost: $22–89.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–89 (est.)

Symptoms

  • Unstable engine operation
  • Reduced engine power
  • Increased fuel consumption
  • The engine may not start
  • Stalls at idle

Causes

  • Fuel pump malfunction
  • Fuel filter clogged
  • Leaks in the fuel system
  • Fuel pressure regulator malfunction
  • Problems with fuel injectors

How to Fix

  1. Check the pressure in the fuel rail
  2. Check the condition of the fuel filter
  3. Inspect fuel lines for leaks
  4. Check the operation of the fuel pump
  5. Diagnose the fuel pressure regulator

Related codes

P0087P0190P0191

FAQ

What does the P3091 code mean?

P3091 is an OBD-II diagnostic trouble code that indicates: Fuel Rail Pressure-Rate-Controlled Minimum Pressure Fallen Below

What causes a P3091 error code?

The most common causes of P3091 include: Fuel pump malfunction; Fuel filter clogged; Leaks in the fuel system; Fuel pressure regulator malfunction.

How do I fix a P3091 diagnostic trouble code?

To fix P3091: Check the pressure in the fuel rail. Check the condition of the fuel filter. Inspect fuel lines for leaks. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3091?

Do not drive — repair immediately

How much does it cost to fix P3091?

The estimated repair cost for P3091 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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