1999 Es300 Check Engine & Trac Off Light

[lexus300aa]

I JUST PURCHASED A 1999 ES300 W/ 92K MILES AND THE CHECK ENGINE LIGHT AND TRAC OFF LIGHT HAVE COME ON. AUTOZONE SAYS THE CAR IS GIVING A FAULT SAYING IT IS RUNNING LEAN. I HAVE TRIED TAKING THE BATTERY CABLES OFF AND AFTER A FEW MILES IT COMES BACK ON. ANY SUGGESTIONS WILL BE GREATLY APPRECIATED. THX, LEXUS300AA

[steviej]

first off, please refrain from using all caps as it is viewed as yelling and rude on this site.

second, was the code Autozone obtained P0420? If not, do you know what the code was.

third, I am moving this to the ES forum as there is another member with a similar problem.

steviej

[lexus300aa]

sorry about the all caps. the code # that it is reading is P0171 running too lean in bank one. all suggestions will be appreciated

lexus300aa

[steviej]

P0171 is System too lean, (Fuel Trim) bank 1.

Here are your trouble areas:

-Air Intake hose, loose or cracked

-Fuel line pressure

-Injector blockage

-Open or short Air/Fuel sensor circuit

-Intake air flow meter

-EFI engine coolant temperature sensor

-Gas (exhaust gas not fuel) leakage on exhaust system

-PCV hose connection

hope this helps.

steviej