My highlander 2008 is showing P0171 and P0174, P1201, and shit to P range, what is the problem

Asked by Apr 23, 2017 at 06:14 AM about the 2008 Toyota Highlander Limited

Question type: Maintenance & Repair

3 Answers

250,605

https://www.engine-codes.com/p1201.html

250,605

P0171 & P0174 are lean codes and in most cases indicate a vacuum leak. Check all hoses for cracks. With the engine running, you can spray carb cleaner around suspected areas and if the idea increases, that is your culprit. A smoke test can also be performed with usually better results.

250,605

Lots of youtube videos on finding vacuum leaks, type in the 2 codes and you'll get tons of info. Start with these codes first, as the P1201 could be related.

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