Running too Lean...P1131, P0171, P0174
#1
#2
Wow, i just searched this topic and nobody has commented on this thread after a month, I know p0171 and p0174 are bank 1 and 2 running too lean. There should be a guide somewhere on this there internet that lists all the codes if you haven't solved this already. From what I understand, it means there is either a lack of fuel to both banks, or an excess of un-metered air to both banks, aka, a intake/ vacuum leak after the MAF.
I'm not an expert, which is why I'm searching for solutions myself. And I know my '99 4.0 ohv is a lot different than a '96 3.0, but I would assume the codes have remained the same, and that is the information I've gathered.
I'm not an expert, which is why I'm searching for solutions myself. And I know my '99 4.0 ohv is a lot different than a '96 3.0, but I would assume the codes have remained the same, and that is the information I've gathered.
#4
i believe Welcome to CanOBD2! has a code searcher you could use. Not sure if that is the correct website.
#5
171 and 174 are lean codes. willing to bet some were in the system there is un metered air coming through and tricking the o2's to say its lean. check everything that is a vacum line or air line espescially around the intake. another thing i have heard with the 3.0 is that the inake gaskets can crack and cause this code.
#7
#8
its more than likckly a vacum/air line cracked
#11