o2 sensor
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
The downstream O2 sensor checks performance of the catalytic converter, have you monitored sensor voltage with a scan tool? Upstream and downstream sensors are the same on a 96, if removal does not turn into a nightmare you can try swapping the sensors then see if the same code resets. If it does, you likely need a new cat.
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Do almost exactly as TopTechx6 says, but leave the O2s in place, just swap the plugs between the 2, so if the sensor IS faulty, you will likely get both codes, if it is NOT faulty, the downstream sensor should still read exhaust O2 levels well enough not to set a DTC. Youll still get the code for the downstream cause itll be reading the upstream flow, and comparing it to the downstream flow, instead of the other way around.
Cant be certain on that, but its worth a shot, so if the cables will reach to swap, try that.
Cant be certain on that, but its worth a shot, so if the cables will reach to swap, try that.
