Questions & Answers for: Toyota Sienna p0420

want to change the O sensors The check engine light has code P0420 I would definitely go with the Bosch brand and there are only two oxygen sensors.  One before and one after the catalytic ...

how to repair po420 code on a 2002 toyota sienna The P0420 code is Catalyst System Efficiency Below Threshold (Bank 1) error. A code P0420 may mean that one or more of the following has happened: ...

...or a broken wire in the o2 sensor If you think the catylist is ok check your 02 sensor instead. P0420 is about the convertor and maybe water got in your tank fron filling it at a fuel stop with ...

...engine lights came on.. I took out the filter from my pathfinder.. No more check engine lights.. P0420=Catalyst System Efficiency Below Threshold Bank 1, The air filter is not the cause here,this ...

01 sienna with p0420 not sure if its the cat. or the o2 Hi, This code occurs very very frequently on these vans. I have come across probably 50 or more in the past few years and to date I have not had

My 2001 TOYOTA SIENNA XLE is showing a P0420 code Problem? My Check engine light is on, My Traction Control light is now showing off? and my VSC(Vehicle Stability Control) Light is on too? After ...

... the vehile hesitates when trottled. have cleaned nossles and changed plugs to no avail Hello: Code P0420 is indicating a catalytic converter that is below efficiency. To repair and remove light the ...

...Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed

2001 Toyota Sienna CEL displayed code P1150 & P0420 what could be the problem CEL displayed code P0420 & 1150 what could be the problem Mine is a 2001 Sienna LE. I got the P0420 code and the ...

P0420 Problem Codes Catalyst efficiency below threshold. It means your catatlytic converter is not working effectively. Make sure you have no exhaust leaks. If you have access to a scanner that can ...