P0125 p1135 p1155 p0171 p1130 p1150
#32
#34
Have you reset and driven after cleaning MAF sensor? If yes, did you still get 0171 and 0420? Hopefully you do not have a bad cat converter but that is a possibility. If your downstream O2 sensor is original, it is most likely not working and I would check it. Did you ever confirm if either or both of your A/F sensors are original? Is your code scanner capable of measuring A/F voltage output? What are your short and long term fuel trims? I hate throwing parts at a problem but if your two A/F sensors and downstream O2 sensor are original, I would replace them first (with Denso only) and go from there. You still could have a vacuum leak somewhere.
#38
You need to have someone with the right equipment and knowledge diagnose your car. You can roll the dice and replace all 3 sensors starting with the downstream O2 sensor. If that does not work, replace both A/F sensors. If you still throw codes, assuming your MAF is working ok and you do not have a vacuum leak or a freak issue such as a loose ground or faulty ECU, you most likely have a bad cat converter. Making decisions based on how blue the wire is will not get you anywhere.
#39
You need to have someone with the right equipment and knowledge diagnose your car. You can roll the dice and replace all 3 sensors starting with the downstream O2 sensor. If that does not work, replace both A/F sensors. If you still throw codes, assuming your MAF is working ok and you do not have a vacuum leak or a freak issue such as a loose ground or faulty ECU, you most likely have a bad cat converter. Making decisions based on how blue the wire is will not get you anywhere.
Unfortunately they don't have that luxury right now with fiananicial stuff going on right now. Thats why I am trying to help.
#43
I'm back. Took the car for a test drive. When I picked up the car it had the check engine light on and the trac off light was on. The codes were p0171 twice and p0420. I cleaned the throttle body and MAF sensor with the battery disconnected. I took it for a drive and at about 10 miles the p0171 code popped up as pending. I kept driving another few miles and then the p0420 code popped up as pending. I will also say that driving above 40mph if you put the pedal to the floor the car is sluggish. It feels like overdrive isn't engaging. But anyways that's where I'm at right now.
#44
Lots of info available on this code combo, eg
http://www.toyotanation.com/forum/26...171-p0420.html
Based on your symptoms, I would focus on fuel delivery. What are your long and short term trims? What is your fuel pressure at the rail? Could be a failing fuel pump or plugged fuel filter. Also could be a vacuum or exhaust leak, faulty/dirty MAF sensor, faulty upstream and/or downstream oxygen sensors. Finally it could be a faulty/plugged cat converter.
Here is a good article re cat converters. Is your car burning a lot of oil?
http://www.aa1car.com/library/converter.htm
http://www.toyotanation.com/forum/26...171-p0420.html
Based on your symptoms, I would focus on fuel delivery. What are your long and short term trims? What is your fuel pressure at the rail? Could be a failing fuel pump or plugged fuel filter. Also could be a vacuum or exhaust leak, faulty/dirty MAF sensor, faulty upstream and/or downstream oxygen sensors. Finally it could be a faulty/plugged cat converter.
Here is a good article re cat converters. Is your car burning a lot of oil?
http://www.aa1car.com/library/converter.htm
Last edited by artbuc; 04-13-15 at 01:50 AM.
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