P0420 toyota prius 2005. Toyota codes p0300 p0301 p0302 p0303 p0304 p0305 p0306 p0307 p0308 p0174 and p0171 can give false data readings that create conditions which trigger code p0420. P0420 2005 toyota prius description the engine control module monitors the switching frequency ratio of heated oxygen sensors 1 front o2 sensor and heated oxygen sensors 2 rear o2 sensora three way catalyst converter manifold with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. This page is meant to help you troubleshoot the toyota prius p0420 trouble code.
If any other codes are present they should be addressed first. This page is meant to help you troubleshoot the toyota corolla p0420 trouble code. Maybe converter gone bad.
My 2005 prius is throwing a p0420 code catalytic converter. In the corolla obdii p0420 is often caused by a bad oxygen sensor but there can be other causes as well. One of the most common trouble codes with all toyota vehicles is the p0420.
It covers toyota prius p0420 meaning symptoms causes and possible solutions. In the prius obdii p0420 is often caused by a bad oxygen sensor but there can be other causes as well. I just got a scan tool that works on my phone and got the two plots below.
Airfuel sensor ashy white normal o2 sensor dirty covered in black carbon explains why its lazy cant read if covered. P0420 2005 toyota prius meaning the engine control module monitors the switching frequency ratio of heated oxygen sensors 1 front o2 sensor and heated oxygen sensors 2 rear o2 sensora three way catalyst converter manifold with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. Leaded fuel in an unleaded system will nearly always trigger this given the differing properties of leaded fuel combustion and exhaust.
It covers toyota corolla p0420 meaning symptoms causes and possible solutions. However if the p0420 code is the only trouble code or if the other codes are all p042x codes the likelihood of a failed catalytic converter is much higher. One of the most common trouble codes with all toyota vehicles is the p0420.
Do not overlook other codes that are paired along with p0420.
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