Emission System - Oxygen Sensors Testing & Replacing - 1 of 3

[BABABOY151]

does anyone know where is the oxygen sensor for a 1999 Pontiac Grand AM

[alundrasrt]

Clever review in simple language.

Thanks!

[qualitatserzeugnis]

hi guys, finally I solved a problem in my car since more than 3 years!! I have one VW jetta 1999 2.0L 4 cil. the VW scanner simple says that the sensor gives the rights values and is operating good but the car performance (acceleration) was poor, after make the torch test I found that the sensor was very slow for changes I simple buy a new one tested with the torch I found out that was more sensitive (fast responses) then I felt my car much faster than before , really THANK YOU VERY MUCH

[96Rolla]

i fallowed that same procedure with my o2 sensor and the voltage did rise within 1 minute but wen i took it out of the flame it took for ever to drop

[CRDLIBERTY]

Hi ive got 2003 corolla been looking at those universal four wire ebay units. $27 im guessing there not bosch lol. From autozone it shows both pre cat and after cat sensors four wires but diff part numbers. How would i know if the ones listed on ebay will work front or back?

[alitou001]

ask the seller he probably knows