maxo898

That's fine but thanks for the advice any ways. I also checked mine yesterday and i am getting p0171 and p0441.

So would i need to change the clamps.

Thanks

Is the fuel air ratio sensor same as the oxygen sensor?

Thanks for the advise i'm going to try to change the intake manifold gasket and tighten any hoses. It's weird because now i am getting 2 other codes with that p0171 they are p0441 and p0446.

Hello, I have a 1999 Lexus es300 with 132,000 miles. It was running fine until i got the check engine and the trac off light come on. When i got the codes from auto zone it said misfire, so i changed all the coils and spark plugs basically a full tune up but the light was still on after i reset it. Later it said oxygen sensor, so i changed all 3 sensors. I also changed the thermostade and cleaned the MAF sensor. When i checked it another time it said system too rich. A couple of days ago i disconnected the battery to reset the system and drove it straight on the highway for 80 miles the light didnt come on until i got off the freeway into the city then the lights came back on after 10 miles driving in the city.(usally the light will come after 6-10 miles when i reset it). Now the code is P0171 System to lean (BANK 1) i read a lot of threads but i still can find the problem.i have spent over $1800 in parts and labor so please help me.

Thanks For Your time.