RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

Looking for tips O2 sensor bank 1 sensor 1

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Old 07-05-06, 09:00 PM
  #16  
slowtan
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Default O2 replacement

sensor replacement ..
cold engine .. 10 mins to un-screw the old sensor . took 30 min to figure out how to get the connector out and remove it .. 5 min to screw in and snap in new connector ..
15 min drive .. CEL stays on but car drives great .. reset CEL by pulling EFI fuse .. drove nearly 1 hour and light has stayed off . car is driving strong again.

TTCLexy3
Make sure you clear your codes after you clean / replace anything. I am not sure how long it takes a Lexus to automatically clear itself. I thought I read 200 miles on a post somewhere but I am not sure. How is your car driving?
Old 07-05-06, 10:39 PM
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TunedRX300
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Originally Posted by TTCLexy3
a friend of mine has a 99 rx300 awd wiith about 67k on it and about 2 months ago i got a check engine light, it said bank 1 lean condition. a friend of mine works on toyotas and he said that it would be the bank 1 a/f sensor so i replaced it and the light keeps coming back. she has a k&n drop in filter in the car. after the light went on, i also cleaned the maf sensor and the throttle bodies. any suggestions on wat else it could be?? my friend said it could also be the maf itself.
There are two sensors on the MAF, make sure you clean both
https://www.clublexus.com/forums/sho...d.php?t=222073
Old 11-16-13, 02:59 PM
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michcar1
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Unhappy 2000/lexus rx300-awd loss compression/misfire= need help

Dear Fellow CL members, I NEED SOME HELP ASAP. ODO 216,000 miles
AFTER LOANING MY TRUCK TO A FEMALE FRIEND, WITHIN 7 DAYS OF ITS RETURN WHILE DRIVING HOME FROM WORK THE (CEL) CAME ON. the car starts to jerk.badly..slow down then go even with my foot on the gas...lound engine rev nosie..would go only 40 mph....transmission will not change out after 3rd or 4th gear.i went to auto zone and got the CEL codes check. ......P0306/P0300/P0300/P0304......it shows misfire on blank 2/... /4 /6 cylinder misfiring plus VVT system malfunction bank 2..i figure it was the spark plugs i had (BOSCH PLUGS) not Good....i change out to OEM DENSO plugs.... 80% problem
sloved. transmission smood

CEL came on back again..codes P0300/P1354 /Random cylinder misfire/ ANY HELP ? WHAT TO DO

Last edited by michcar1; 11-16-13 at 03:26 PM. Reason: add more info
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