Lexus Troubleshooting Questions? Ask a Lexus Expert
This very well could be the result of the battery dying. If so, the vehicle will need to be driven roughly 50-75 miles of combined city and highway driving (known as a :Drive Cycle"). If by this time the lights have not cleared themselves, the Diagnostic Trouble Codes (aka "P-Codes") will need to be scanned from the on-board computer. These p-codes are the starting point for the diagnosis of the problem and will point to the part/sensor that has the problem. From there, the correct repair can then be made. You can have these p-codes read FREE (except in California) at any local "big chain" part store (ie. AutoZone, PepBoys, Advanced, etc). If you found this answer helpful, please help me by leaving a rating using the "stars" at the top of the page or click 'accept'.Rating or accepting my answer does not cost you extra. It allows me to be credited for this Q&A. If you cannot rate or do not see where to rate, please let me know!
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