My engine light has been on with code P2191. No one can tell me how to fix this.




I am sorry to hear you have this problem. Not an easy thing to be honest.

So before we go forward, let me tell you what that code actually means.


A Code P2191 means that the engine is running lean, only on one side.

It is officially called: Trouble Code: System Too Lean at Higher Load Bank 1

This might not cause a lot of problems in the short-term but in a few weeks or months, Eventually damaging your engine.


However, solving this is not an easy thing. Since there are so many variable you have to look at.

Some possible issues that might be causing code P2191


1. A leak in your car's exhaust

2. A problem in the PVC system

3. A fuel injector that is leaking

4. High fuel pressure condition.


You can start to check these one by one and let me know what happens

Lori robinson, 2019-03-13

Thanks for the info I took it to a mechanic yesterday that fix my catalytic converter. He suggested that I take it to the dealer because he has a feeling it's something to do with my injector. So I have an appointment scheduled for Friday I'll keep you updated

Plain text

  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type='1 A I'> <li> <dl> <dt> <dd> <h2 id='jump-*'> <h3 id> <h4 id> <h5 id> <h6 id>
  • No HTML tags allowed.
  • Lines and paragraphs break automatically.
  • Only images hosted on this site may be used in <img> tags.
The content of this field is kept private and will not be shown publicly.

Disclaimer: Youcanic has made every effort to assure the accuracy of the information on this page. Neither Youcanic nor its affiliates assume responsibility for any loss or damage due to any errors, omissions, lack of information. You agree to hold Youcanic free from any liability arising out of the use of any information contained within. All pictures and references to trademarks and car names are for reference only and do not imply an association with the manufacturer. Consult your owner's manual or authorized factory manuals when performing repair procedures. By entering this site, you agree to our Terms & Conditions and Privacy Polity.