code P0171?

1999 TOYOTA PICKUP
Avatar
JACK B
  • MEMBER
  • 2 POSTS
Hello, Engine light came on the other day.Prior to the light, the motor shut off doing about 25-30 mph. I stopped and restarted then drove off. It seemed a little sluggish ( like dirty fuel filter,injectors ?). I rented one of those autoscanners,and came up with a code P0171 wich turns out to be" system too lean".....Where does one begin to fix the problem ? Is it a costly process of elimination ? Please respond asap Thanks ......
Feb 17, 2008 at 2:36 AM
Advertisement
Avatar
MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! Also don't forget to check, or change the PCV...
Feb 17, 2008 at 2:42 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle