Question about 2000 Lexus RX 300

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2000 RX 300. Code P1130. I have already replaced the mass air flow sensor on te top of the air intake. The missing stopped but I still have this code. I have cleared the code twice and it still comes back. Any thoughts. Thanks.

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  • wrkhdplayhd Jul 13, 2009

    Thanks for the response. After checking many posts including club lexus it appears that the most likely source of the problem is the Oxygen sensor on the back side of the engine before the cat. The connector is tough to get to and the part is $$ but I think that will be my next move. Wish me luck. My e-mail is wrkhdplayhd@yahoo.com. Thanks.

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P1130 A/F Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1). Some possible trouble areas include: open or short in a/f sensor circuit, a/f sensor, air induction system (which it looks like you already checked), fuel pressure, fuel injectors, or your ECM (Engine control Module). I can send you steps to check these but i need your email address cause i can not post them on the internet do to copy right laws.

Posted on Jul 11, 2009

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The Mass Air Flow (MAF) sensor is located in the stream of intake air and measures this intake flow rate by measuring a part of the entire intake flow. It is what they call a hot film and is supplied with electric current from the Engine Control Module (ECM).
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5787058.jpg

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