Engine-Codes.com | All About OBDII Engine Codes
Engine-Codes.com | All About OBDII Engine Codes

P0171 Honda

P0171 Honda - Fuel Injection System Too Lean Bank 1

PDF
P0171 Honda Comments |  Add Comment
Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
Help with Possible causes What does this mean?
Tech notes
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.
Help with Tech Notes What does this mean?
When is the code detected?
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P0171 Honda Description

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.

In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).

P0171 Honda Information for specific Honda models
Need more help?
Do you need more help with the P0171 Honda code? ask a question to our users or search the top hand picked automotive forums for more information


(You will add more details to the question in the next step)
or
HONDA Technical Service Bulletins for P0171 code
2007 HONDA CR-V Engine And Engine Cooling:engine Details
2007 HONDA CR-V Fuel System, Gasoline Details
2007 HONDA CR-V Fuel System, Other Details
2007 HONDA CR-V Electrical System:wiring Details
2008 HONDA CR-V Engine And Engine Cooling:engine Details
More Bulletins Help with Technical Service Bulletins What does this mean?
Repair Shops Around Your Area
  • 4x4 Land LLC 18 Views
    Yelp Rating on Engine-Codes.com
    14065 Willard Rd
    Chantilly, VA
    (703) 263-3307
  • A & G Car Care 14 Views
    4076 Walney Rd
    Chantilly, VA
    (703) 378-2005
  • A & J Automotive 19 Views
    4399 Henninger Ct Unit-H
    Centreville, VA
    (703) 817-9880
See More...
Need parts?
Need parts to fix this code? Search hundreds of stores at the same time and compare prices


Help Engine-Codes.com
Help us improve Engine-Codes.com. Leave a comment below or tell us if the information above help you fix the code. What are symptoms is your vehicle for the P0171 Honda code? Have you replaced any parts?
Any information is appreciated. Thanks
Engine-Codes.com Comments Powered by Disqus
Google +
Engine Light ON?

The Engine-Codes.com ELM327 WiFi Car Diagnostic connects to your Android phone, iPhone, iPad, or Windows computer from your vehicle.
Ask OBDII Question