Originally Posted by
jtrom
Once in a while I get a PO171 code. Car run fine, so I see the reason, and put it out. Replaced map air , and two Bosch upstream sensors. Light still comes on once In awhile. Brought to dealer, and they say with those 02 sensors they don’t see voltage change like they should. Can’t find oem sensors, and is this really the problem or a process of elimination. Thanks I’m advance for your help. John
John The only help I can offer for you is NEVER TAKE THE CAR TO A DEALERSHIP AGAIN! That being said, if you look up the code here, you might be able to help yourself by searching the forum for ideas. Knowing the DTC error doesn't necessarily tell you what or where the defect is. It'll only 'point' you in a direction to help determine the defect(s). Absent that, someone else might chime in to help. As a footnote, what did the dealer rip you off (in dollars) for the 'diagnosis'? Hopefully, they didn't (also) soak you for more before you took the car out of their guesswork bay. Good luck!
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