Get OBD codes! If you have a Check Engine (CEL) or Service Engine (SEL) Soon light on, get the codes read and have them available if possible befoer posting. You can have codes read at Auto Zone, Pep Boys, O'Reilly's, etc., for free in most states. Write them down. They will have a letter followed by four numbers, for example "P1234".
P0420 Catalyst Syetem Efficiency Below Threshold Bank 1 My wife has a 2003 4 cylinder Toyota Camry LE with auto trans and 115000k miles. We've been getting the P0420 code off and on over the past few months.
The rear O2 sensor measures both cat convectors, I have seen people replace one cat and hope it fixes the P0420 code. Your car's computer stores many problem parameters it saw when it illuminated the Check Engine Light. These codes stay in the memory of the computer until erased.
Video on how to properly diagnose dtc P0420 on a 2003 toyota corolla s, catalyst efficiency below threshold, bank 1.
One of the most common trouble codes with the Toyota Camry is the P0456 code.This trouble code references a number that is given to you when you plug your Camry into a OBDII scanner.P0456 Indicates that there is a small leak in the evaporative emission control system.
I have a 2003 Toyota Camry that is throwing a p0420 code. However, it doesn't always do this. Interestingly, it only does it when I've been using the air conditioner. If I don't use it for a while, my check engine light goes off and doesn't turn back on until I use the AC again. Any thoughts about what is going on?