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Greetings All. My Step-Son who is in collage has a 02 Corolla LE with the 1.8 Liter engine, Automatic and AC, 95K miles. currently posting codes P0171 System too lean bank 1, P0130 O2 sensor fault, P0133 O2 sensor slow, P0441 EVAP system purge flow. It is running ok although it does have a hard start condition when cold and he has to pump the gas a bit to get her started. I have a code scanner capable of live data, although I would need some help as what to capture. Still reading the manual and learning. I don’t have regular access to the car but can make arrangements to get it in my garage for a few days to diagnose. Hoping once I have a plan I will be able to make the needed repairs on a weekend. Not a Automotive Technician by trade but i am a 30 year technician on printing presses, so technology and tools are not foreign to me and I have a decent garage to handle car repairs.
Looking for some advice as to where to start with the O2 sensor codes. I replaced the upstream and Downstream O2 sensors last year and think the part of the problems are there as I had a very difficult time with the studs in the exhaust manifold and getting a good seal on the upstream sensor. Hoping to find some advice for a repair here without having to replace the entire manifold. I am going to order a new sensor manufactured by DENSO.
For the P0441, I am going to start with looking for leaks at the air intake under the hood, and then get the car up on jack stands and look for leaks or bad connections at the canister, which should be a whole lot of fun working on the floor. It has a new after market market gas cap but I am seeing some advice online to purchase a new $30 Toyota cap as well.
Also would like advice on where to find a tutorial or video for replacing the timing belt. I would like to get that replaced before bad things happen. Still running with the original and should be replaced.
Any advice on a plan of action greatly appreciated!
Thanks To All
Scott
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Given those codes, you are correct to start with the sensor. Yes, only use Denso O2 sensors.
Also to get the upstream sensor off easily, take off the drivers side wheel and use a long 3/8 extension to remove the nuts. The O2 sensor nuts will easily be removed at a 90 degree angle through the side of the engine through the wheel well.
For the P0441 based on my experience is the VSV under the car by the charcoal canister (under the car by the muffler; it is a plastic box about the size of a small shoebox). These VSV’s get a lot of road salt, grime, crap, etc because of where they are… A simple test to raise up the back end, get in underneath it and look for the VSV (there will be a pressure sensor and a VSV under there). Disconnect the VSV electrical plug and hook a 9 volt battery (using wires) to the two connections on the VSV. If you hook it up and don’t hear a click, you definitely know it is bad…
I would replace the upstream O2 sensor and see if the P0171 goes away… If not, give the MAF a good cleaning (don’t just clean the red bulb, that is the Ambient Air temperature sensor)…
I have owned six Generation 8 (1998-2002) Corollas/Prizms… they are easy to fix…. Good luck…
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