lina_lange10
Lexus RX exhaust smoke warning light
Summary of the thread
A 2008 Lexus RX owner noticed a warning light on the speedometer and smoke from the exhaust when accelerating, suspecting an issue with the exhaust back pressure sensor. Another Lexus RX owner suggested checking the sensor's readings with a diagnostic tool. The original owner took the vehicle to a workshop, where the problem was confirmed to be the exhaust back pressure sensor, which was then repaired.
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4 comment(s)
lina_lange10 (community.author)
Thanks for the input. I don't have a diagnostic tool myself. Is there a specific range I should be looking for in the sensor readings, or is it more of a yes/no, working/not working situation? Any tips on locating the sensor?
siegfriedmayer6
I do not know the precise range, but incorrect readings indicate a malfunction. Considering your lack of experience with diagnostic tools, I recommend taking your vehicle to a qualified workshop for inspection. They can accurately diagnose the problem and ensure proper repair.
lina_lange10 (community.author)
Appreciate the advice. I took it to a workshop, and you were spot on; it was the exhaust back pressure sensor. Repair cost me 245€. All sorted now.
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LEXUS
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RX
siegfriedmayer6
I also own a Lexus RX, and those symptoms might suggest a defective exhaust back pressure sensor. Have you considered checking the sensor's readings? Perhaps a diagnostic tool would give you a definitive answer.