Question about 2000 Chevrolet Venture
Posted by Anonymous on
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Posted on Jan 02, 2017
P0171 indicates the computer has detected a "lean engine condition". Sorry to say you couldn't have gotten a worse code. By that I mean there are sooo many things that can cause a P0171
However I'll just run down a few of the more common causes:
1 - Look for any obvious vacuum leaks around the engine area. Vacuum leaks will definetley
cause a lean condition which will trigger a check engine light and code P0171
Especially check around the PCV system and where the EGR valve mounts to the intake.
2 - Check your oxygen sensor wiring to make sure it is not chaffed and shorted. This will force a
lean condition and set P0171. O2 sensors are located on your exhaust system pipes and
3 - A constant or intermittent engine miss will trigger this code. Check for fouled or shorted
spark plugs or weak spark plug wires.
4 - Low fuel pressure will also trigger P0171. Check your fuel pressure if thats possibe. If it's low,
check to make sure your fuel filter is not restricted. Otherwise, you may have a weak fuel
Try these tips first.If not successful, we'll take it 1 step further. Good luck!
Posted on Oct 05, 2011
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