Error codes P0446 P0450
Thread Starter
Driver School Candidate
Joined: Nov 2011
Posts: 1
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From: IL
Error codes P0446 P0450
Check engine light came on in my wifes 1999 RX300. Error codes P0446 and P0450 were shown when I ran the error code reader. What is the cause and how can I fix it?
Lead Lap
Joined: May 2006
Posts: 3,999
Likes: 37
From: FL
If you use the search features of the forums you will find most questions have already been answered for you on your RX300.
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
P0450 Evaporative Emission Control System Pressure Sensor Malfunction
Check your gas cap. Is it tight? Clear the codes. Do they come back? Try replacing the gas cap. Clear codes. Do they come back?
Do you constantly fill the tank to overfill? If the gas cap is not the problem then you may have a damaged evaporative canister.
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ChanceM40
RX - 1st Gen (1999-2003)
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Nov 23, 2014 06:36 AM
