K kenzo42 New member Jan 21, 2008 #1 Can anyone tell me how to test the O2 sensor on a California 99 4runner? I'm getting the P0420 code. I have a multimeter to test it w/. Just not sure how to go about it. Thanks.
Can anyone tell me how to test the O2 sensor on a California 99 4runner? I'm getting the P0420 code. I have a multimeter to test it w/. Just not sure how to go about it. Thanks.
B BTLFED New member Jan 21, 2008 #2 When you read the code it should tell you which O2 Sensor it is. It should say Bank 1 sensor 1 or 2 or Bank 2 sensor 1 or 2.
When you read the code it should tell you which O2 Sensor it is. It should say Bank 1 sensor 1 or 2 or Bank 2 sensor 1 or 2.
