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Subject: "What causes code 171? (too lean in cylinder 1)" Previous topic | Next topic
LeeJul-19-02 02:42 AM
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#26863, "What causes code 171? (too lean in cylinder 1)"




          

Everything looks good, fuel pressure, egts, a/f. So what could cause this?


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Global Ruler Of All ThingsDarkOneJul-19-02 04:59 AM
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#26864, "RE: What causes code 171? (too lean in cylinder 1)"
In response to Reply # 0




          

How did you get that code? I've neve rheard of that before - our car's monitoring system has no way of knowing if a particular cylinder is lean - only that a lean condition exists.

I think you read that code wrong..

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thedawgJul-19-02 07:12 AM
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#26865, "RE: What causes code 171? (too lean in cylinder 1)"
In response to Reply # 1


          

Huh? Lots of people have gotten that... it's P0171 to be more specific. And also.. it's BANK #1, not cylinder #1. emoji

Possible causes: Fuel system, Excessive fuel press (This is why I and several others with HRC kits get it, check your FPR), Low fuel press (check your FPR again, hehe), Vapor recovery system blocked, PCV system blocked, Dipstick out, Stuck or broken EGR, engine oil overfill, exhaust leak before O2 sensor (check your manifold with soap water on a cold start), bad compression (unlikely).


  

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LeeJul-19-02 11:12 AM
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#26866, "RE: What causes code 171? (too lean in cylinder 1)"
In response to Reply # 2




          

Sweet, so it's not really a big deal. I know I have an exhaust leak b4 the o2 sensor.


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