Code Po171?

2006 TOYOTA COROLLA
191,000 MILES • 1.8L • 4 CYL • AUTOMATIC
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BFERN8642
  • MEMBER
  • 2 POSTS
Po171 code. Car hard to start in morning but runs great afterwards.
Jul 2, 2023 at 10:03 AM
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AL514
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 5,477 POSTS
Hello, there is most likely a vacuum leak somewhere, if it gets better after it warms up, it might be the Intake manifold gasket, when things warm up and expand some leaks can be less at that point.

Here is a guide on lean exhaust issues:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers
Jul 2, 2023 at 1:53 PM