2001 Infiniti I30 Q&A
2001 Infiniti I30 Question: O2 sensor problem
I would check for vacuum leaks, this will cause a "lean" condition and set the codes that you are getting. You can learn more about this here: http://repairpal.com/OBD-Code-P0171-and-P0174 Have all of these sensors been replaced at the same repair shop? - Bret Bodas
car has three o2 sensors, but dont know which is wich.
2001 Infinite I30. I had O2 Sensor Bank 1, Sensor 2 replaced in May of 2010 by a new mechanic. They recommended that, in these cars, all 4 sensors work together so ALL four should be replaced but...
The mass air flow (MAF) sensor may fail, resulting in drivability issues and/or illumination of the Check Engine Light.
I did all the necessary repair needed for my 1996 Infiniti I30t check engine light which was my upstream o2 sensors, i then clear the code, i've been driving for over 3 weeks now and all my readine...
I recently had o2 sensors code and got that taken care off i put 3 new o2 sensors in then i got the dreaded po420 code i replaced the middle catalytic converter which i heard was the right one then...