hi i put my standed exhaust and cat back on yesterday and my car started feeling funny when i was driving so i pulled over and plugged the reader in

and they was 2 codes.....16514 02 sensor and 17545 over fueling .....i guess its the sensor wat is making the other code pop up..

i dont no why the o2 sensor could be faulty as i put it in right and in the right hole.....and plugged it in right....which one is the 02 sensor is i

it the one closest to the turbo? any help will be great full thks

Edited 4 April, 201016 yr by vrsjaw

hi i put my standed exhaust and cat back on yesterday and my car started feeling funny when i was driving so i pulled over and plugged the reader in

and they was 2 codes.....16514 02 sensor and 17545 over fueling .....i guess its the sensor wat is making the other code pop up..

i dont no why the o2 sensor could be faulty as i put it in right and in the right hole.....and plugged it in right....which one is the 02 sensor is i

it the one closest to the turbo? any help will be great full thks

They are both oxygen sensors (usually known as lambda sensors).

The reason two sensors are fitted (one befor the cat and one after) is it improves ECU response time and accuracy and also enables the ECU to monitor the cat's performance.

HTH.

hi i need to no if the sensors need changing or cleaning as there not damaged in any way and only happen when i changed my exhaust and cat back to standed

all sorted now the plug on 02 sensor was not on..... thks any way

What reader are you using out of interest?