AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - P1171

P1171 Code - Fuel System Lean During Acceleration

- Code Popularity: 50,464 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P1171?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Low fuel in the fuel tank
  • Clogged fuel filter
  • Faulty Fuel Pump
  • Faulty Oxygen Sensor
  • Faulty Coolant Temperature Sensor
  • Faulty or dirty Mass Air Flow sensor
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC P1171?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P1171 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1171 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1171 Description

The Powertrain Control Module (PCM) internal circuitry can identify if the vehicle fuel system is capable of supplying adequate amounts of fuel during heavy acceleration (power enrichment). When a power enrichment mode of operation is requested during a Closed Loop operation (by heavy acceleration), the PCM provides additional fuel to the engine. Under these conditions, the PCM should detect a rich condition. Whenever this rich exhaust is not detected, a Diagnostic Trouble Code (DTC) P1171 sets. A plugged fuel filter or restricted fuel line can prevent adequate amounts of fuel from being supplied during power enrichment mode.

OBDII Code P1171 - Fuel System Lean During Acceleration - AutoCodes.com
P1171 Code - Fuel System Lean During Acceleration

Need More Information on the Code?

Need more information on how to fix the P1171 code? Get Access to Factory Service Manuals

Information for Specific Makes

Need Help with the Code?

Get the P1171 code diagnosed by a professional: Find a repair shop in your area

Code P1171 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P1171 code? Have you replaced any parts?
Any information is appreciated. Thanks