Engine-Codes - Generic - P1181

P1181 - Fuel Delivery System Malfunction High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1181 Possible Causes

  • Fuel pressure regulator

How do I fix code P1181?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1181 code

Labor: 1.0

The cost of diagnosing the P1181 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1181 Meaning

The Powertrain Control Module (PCM) receives Fuel Tank Pressure (FTP) information from the Natural Gas module (NG), which uses the information to infer Fuel Rail Pressure (FRP). The test fails when the inferred pressure is less than a maximum calibrated value.

P1181 More Information

Need more information on how to fix the P1181 code?
Get Access to Factory Service Manuals

Information for specific makes

  • P1181 AUDI Linear Oxygen Sensor Reference Voltage Open Circuit
  • P1181 BMW O2 Sensor Signal Circuit Slow Switching From Rich to Lean Bank 2 Sensor 2
  • P1181 FORD Fuel Delivery System Malfunction High
  • P1181 HYUNDAI Fuel Pressure Monitoring
  • P1181 LINCOLN Fuel Delivery System Malfunction High
  • P1181 MERCURY Fuel Delivery System Malfunction High
  • P1181 MINI O2 Sensor Signal Circuit Slow Switching From Rich to Lean Bank 2 Sensor 2
  • P1181 VOLKSWAGEN Linear Oxygen Sensor Reference Voltage Open Circuit

Need more help?

Get the P1181 code diagnosed by a professional: Find a repair shop in your area