Check Engine Light Code 01 too lean???

577-Jersey · #1 09-30-2015, 08:13 AM

Other day my check engine light came on and i got a code 1 engine running too lean,,my air filter is clean and i always run fuel injection cleaner through...I unplugged the battery to reset code and dumped a bottle of Lucas in it,,so far so good but what is this code and how do I resolve the issue if the light comes back on?
Thanks in advance!!

Tommy

djfllmn · #2 09-30-2015, 08:27 AM

If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

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Quote:

Originally Posted by 577-Jersey

Other day my check engine light came on and i got a code 1 engine running too lean,,my air filter is clean and i always run fuel injection cleaner through...I unplugged the battery to reset code and dumped a bottle of Lucas in it,,so far so good but what is this code and how do I resolve the issue if the light comes back on? Thanks in advance!! Tommy

all you did was clear the code. Once the monitors reset it will come back.

You have unmetered air entering the engine. Hence the lean code

Jswifto · #3 09-30-2015, 10:31 AM

On your truck the pcv elbow normally goes bad.

577-Jersey · #4 09-30-2015, 01:18 PM

Thanks guys I will look into that and report my findings back!!
Really appreciate it..I thought It may have something to do with the PCV valve

577-Jersey · #5 09-30-2015, 04:32 PM

Well I checked the 90 hose and low and behold it was cracked..lol..it looks just like the picture of the guys on the other thread..I found a small piece of straight hose and heated it up to bend it slightly fixed it right up.
Thanks a whole lot guys i would have never found that problem so fast if it wasn't for you guys and the forum!!
Tom