druhanson55

:chairshot:I can't get the light to go off and code 21, (Main O2 sensor signal (left)) won't clear. I pulled the fuse with no luck and pulled the -battery cable overnight. When reconnecting the battery cable the cel light is still on and code 21 is still present. I don't understand how the code can show up again before running the engine?? Does this suggest that I have a short in the O2 sensor circuit? The car runs fine but I need to get this cleared so I can get my inspection sticker. All help is greatly appreciated !!!

Update, I justed pulled the codes via DLC2 and O/D OFF indicator light flash and I receive a code 63. Alldatadiy claims code 63 refering to No.2 solenoid Valve and/or valve circuit. If ECU detects the situation once,it will hold the code, but will only alert me if it detects the situation continously 8 times or more in one trip. With this additional info, do you still feel it worth my while too proceed with the Dextron flush and replace first or research code 63 further?? Keeping in mind that my problem only takes place while the fluid is cold. If you would like,I will post more info related to code 63 diagnostic chart. Thanks again!!

Tranny won't up-shift out of 1st until the fluid warms up.Once it warms up, it runs great. I changed the fluid and filter about 10000 miles ago but I used Dextron III. Within a couple hundred miles of that I did the 3qt change using the proper fluid purchased from toyota. I now notice the fluid smells burnt.I'm considering doing a complete fluid change with new toyota fluid but I don't want to do this without getting feedback cause if someone with more knowledge on this thinks I'm wasting my time and money going this route,I'd like to know your thought's.Thanks!!