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Question

I have a 2000 RX300 it had a check engine light for A/F sensor heater problem. I replaced all Three O2 Sensors. Now the car has a cel on and runs rough in a certain spot on accel and decelaration and smells like rotten eggs. I do know something about these systems, but I can't find any vacuum leaks, I replaced gas cap. It has 78000 miles and has been well maintained and I run good fuel. Please give me some idea's I'm scratching my head!! Thanks

Submitted: 75 days and 22 hours ago.
Category: Lexus
Value: $15
Status: CLOSED
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Optional Information

Year: 2000
Make : Lexus
Model: RX300
Engine: 3.0 V6

Already Tried:
O2 sensors, gas cap, air filter , checked for vacuum leaks, Fuel system cleaner Lucas, original code was A/F sensor heater problem

Accepted Answer

Hi XXXXXXXX,

 

If these are aftermarket sensors and not from the dealer, that may be the whole problem. They're not made to meet manufacturers specifications. A test called Mode $06 will tell exactly what we need to know, but the next best thing is this information I'm sending you.

 

Thanks for your question,

 

Ron

 

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Expert: rpmdiag
Pos. Feedback: 90.0 %
Accepts: 
Answered: 9/7/2009

ASE Certified Technician

33 years experience in driveability for domestics and imports, also a professional Instructor

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