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Germ2112

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  • Lexus Model
    RX 300

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  1. Hello all, 99 RX300 Well about three weeks ago I took a trip of about 300 miles and on the trip I got a CEL that came on while driving home. Stopped and tightened the gas cap to be certain and the light stayed on. Disconnected Battery but it came back on. Had Autozone run the scan and got P0171. The guy at Autozone suggested he thought it was the O2 sensors. I went to a local Mechanic who said the MAF meter. The light was going on and off every so often (not flashing). I cleaned the MAF and the light went off for a bit but came back on. I replaced the MAF myself as well as Air filter and put in fuel injector cleaner. Once this was done the light did go off on its own after a bit but after 50 miles it reappeared. Do I need to reset the engine light by disconnecting the battery or is there anything else you can suggest since the light comes on a goes off every so often. How can I check the gas cap to be sure it is not de-presurizing? when do I need to get it into the shop after exhausting all simple solutions? Thanks all!!
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