po171,po300,p1133 need help
Vacuum leak
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Find and repair your vacuum leak and the other 2 codes should go away.
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This is a very cool post. Shows just how helpful the members can be.
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Describe circumstances leading up to problem. Has anything been serviced on the engine or fuel system recently?
why does the general consensus so often seem to be “lean codes = vacuum leak” . . . ?!
I can think of plenty of instances where that wasn’t the case
Just like an evap leak code isn’t always because of the fuel filler cap
diagnosis . . .
There was not much to go on with the problem description. There are other things it could be, but a vacuum leak is the highest probability.