changed upsteam o2'sno different do i need to do downstreams?

Asked by gary04 Jun 28, 2013 at 02:06 PM about the 2000 Ford Windstar LX

Question type: Maintenance & Repair

5 Answers

48,605

No. Unless something is wrong with them.

1 people found this helpful.

check engine light and codes po 171 ,174 with brand new engine about 3000 miles ago

48,605

You most likely have a vacuum leak causing the lean codes.

1 people found this helpful.

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