Question about 2000 Oldsmobile Silhouette
Replaced intake manifold on 2000 silhouette 3.4. now getting error code PO171 system too lean, bank 1Is that an O2 sensor? how to check
Here are some possible causes, I would start with anything related to replacing the intake.
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Fuel control sensor is out of calibration
Low fuel pressure (fuel filter clogged, pressure regulator failure)
One or more injectors restricted or pressure regulator has failed
O2 sensors contaminated, deteriorated or has failed
Vacuum hose is disconnected, broken, leaking or loose
Posted on Jan 28, 2009
I had this problem. I had a code reader that I got from Costco for $35 and the error key read P2187 and the problem was "System Too Lean at Idle Bank". I talked to my uncle that was a mechanic and he said that it is usually a vacuum hose problem if there is an inconsistent idle as I was experience, especially is it was only at idle. I got a flashlight start the car up lifted the hood and looked at every rubber hose starting at the air filter. There was one that was loosely connect to the nipple, I pressed it down all the way and looked for more possible leaks but that fixed it. I started the car with the code reader twice, and it said "no codes found" both times. Try that first!
Posted on Sep 22, 2009
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Posted on Jan 02, 2017
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