Question about Lexus RX 300
Running lean, try cleaning your MAF sensor, a dirty or faulty MAF will cause your engine to run lean. Cleaning the MAF with automotive electrical spray cleaner and see if that helps your issue.
What would really help you is to get a code scanner. Then you can clear the codes, and as soon as the CEL trips on, you can pull the code right away. That way you can get the first code(s) that shows up, which is usually the problematic code... if you continue to drive the vehicle with the CEL on and an air/fuel issue, it almost always causes additional 'chain reaction' codes to show, and those can be misleading to the root problem.
Again, I would clean the MAF, then reset the ECU ( do it with my code reader, or you can disconnect the battery for a few moments, too). Then, when the first code pops up, scan for it. That'll point you in the right direction.
Thank you for using fixya and keep me posted.
Posted on Apr 27, 2010
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Posted on Jan 02, 2017
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