go to www.advanceautoparts.com and under do it yourself click on how to video clinics and another window will open. click on sensors 101 and it will show you how and what you need.
Replace fuel filter and check the 02 sensor if the check engine light is on it's probably the 02 sensor run a diagnostic test to be sure
where is the secondary 02 sensor on a 2004 crv
exaust leaks , faster if its before the 02 sensor
02 sensor
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
underneath the cam rod with the 02 sensor
how to test crank sensor
You have a bad 02 sensor after the catalytic converter.
02 sensor heater curcuit malfunction (bank 1 sensor1)---change front 02 sensor if need be.
That would be the sensor in the exhaust after the catalytic converter ( downstream )
That would be the sensor after the catalytic converter.
That is the sensor in the catalytic converter.