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  1. Corolla 9th Gen/1st Gen Matrix (2003-2008)
    I know this has been posted on a lot but my CEL keeps coming back on! I've replaced my intake manifold gasket, MAF sensor, upstream 02 sensor. Checked for vacuum leaks, gas cap, etc. No idea what the problem is, it's driving me insane! I most recently replaced the MAF sensor and the light...
  2. Avalon 2nd Generation (2000-2004)
    I hope someone can help me with my 2000 Avalon XL. 6 mos ago I lost the vacuum in my gas tank (when I took off the cap, there was no suction sound and pump would cut off every 5-10 seconds when trying to fill). A few weeks ago, my CEL came on. The dealership pulled a P0171 code and told me that...
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