O2 Sensor problem FINALLY SOLVED!!!!!!!!!
06-22-10, 07:11 AM
#46
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I have been having o2 problems as well. I can put new sensors on and the light still comes right back on. If i can get my hands on an obd-1 scanner what should I look for and do I need to look into getting a new tps??
06-30-10, 03:33 PM
#47
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The pic of the DLC1 connector is below. If you can actually get it open, follow the instructions here:
The EFI fuse can be found by opening up the fusebox (big, black box on the right hand side of the car, under the hood w/ two screws) and looking at the labeling on the back of the cover. If anyone wants a labeled pic, I would be happy to post it. Just ask.
The EFI fuse can be found by opening up the fusebox (big, black box on the right hand side of the car, under the hood w/ two screws) and looking at the labeling on the back of the cover. If anyone wants a labeled pic, I would be happy to post it. Just ask.
Baraka, take a flat head screw driver to the side where the clip is towards the rear of the engine. Start trying to separate the diagnosis box first, then put the flat head in there and pry it open. Works like a charm and takes about 3 seconds.
08-17-10, 06:39 AM
#48
O2 sensor
Can you give me the link for the 'how to' change the O2 sensor you wrote up..thanks.
11-14-11, 04:01 PM
#49
Hate to revive an ancient thread, but my 92 SC400 threw codes 21 and 28. I replaced both main o2 sensors yesterday and reset the ECU by pulling the EFI for 10+ min, but after a few minutes of driving, it threw codes 21 and 28 again. I see many people on here are having the same issue, but there are no solutions. Anyone that posted here before with said o2 codes, what did it take to fix it? How is the TPS related to codes 21 and 28? Thanks
03-23-12, 01:14 PM
#53
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has anyone tried replacing or testing your knock sensors I ran test on mine today with a o scope and found irregularity in the pattern have ruff idle sometimes fuel smell from running rich even though it says its running lean in open loop (at Start up gettin to operating temp)
05-11-12, 04:32 PM
#54
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your right about the lean code but the universal o2 sensors wont work without modifacation i took the oem o2 sensor cut everything off the play then had to drill nd tap the threds for the universal sensor it was 40 bucks for the 2 upstream sensors then another 40 for the machining buying the replacements saves me 100 dollars but what i dont get is my car is running lean but it gross polluted on hydrocarbons but thats unburned fuel i believe
05-22-12, 09:11 PM
#55
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I just did the 2 mains with Denso O2's along with 2 high flow cats and I still have the lights on which code 21. I see someone did the actual code reader and got the TPS but when you did it yourself did you get the O2 sensor?
10-30-17, 11:12 PM
#56
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I changed and inspected all my spark plugs today, the white smoke was less and so was the gas fumes , i am gonna run a straight pipe after the resonator and replacing my front o2 sensors first cause my motor is lean and pushing more fuel , injectors will be tested and flush of the radiator and heater core , found a clean lexus at the salvage yard to pull parts off , ecu for $40 , grill for $30 ish , getting coil overs , used spacers on front to clear aftermarket rims from touching calipers, replace those wheel studs for longer ones, this eebsite/ discussion biard is very helpful
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