OBD Guide
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P1186

Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low

P1186 is an OBD-II diagnostic trouble code meaning: Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low. Common causes: fuel pump malfunction, clogged fuel filter. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Loss of engine power
  • Misfires
  • Unstable engine idling
  • Difficulty starting the engine
  • Increased fuel consumption

Causes

  • Fuel pump malfunction
  • Clogged fuel filter
  • Problems with the fuel pressure regulator
  • Leaks in the fuel system
  • Problems with wiring or sensors

How to Fix

  1. Check fuel pressure using a pressure gauge
  2. Replace the fuel filter if necessary
  3. Check the operation of the fuel pump
  4. Inspect the fuel pressure regulator
  5. Check the fuel system for leaks

Related codes

P1187P1188P0190

Error P1186 by Vehicle Brand

BMWBuickCadillacChevroletChryslerFordGMGMCJaguarLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1186 code mean?

P1186 is an OBD-II diagnostic trouble code that indicates: Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low

What causes a P1186 error code?

The most common causes of P1186 include: Fuel pump malfunction; Clogged fuel filter; Problems with the fuel pressure regulator; Leaks in the fuel system.

How do I fix a P1186 diagnostic trouble code?

To fix P1186: Check fuel pressure using a pressure gauge. Replace the fuel filter if necessary. Check the operation of the fuel pump. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1186?

Limited driving only, diagnose soon

How much does it cost to fix P1186?

The estimated repair cost for P1186 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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