GolfGTIforum.co.uk

Model specific boards => Golf mk4 => Topic started by: ukvolkswagger on 09 April 2012, 13:23

Title: 02 sensors wrong way round? please help
Post by: ukvolkswagger on 09 April 2012, 13:23
hello;
i have an AUM 1.8t engine whith managment light oni got the mechanic to change one of the oxygen sensors and he said they was the wrong way round but i told him not to change it this is the sensor on bank 2 after cat http://www.ecstuning.com/Volkswagen-Golf_IV--1.8T/Engine/Emission/Oxygen_Sensor/ES258802/
and on bank 1 this http://www.ecstuning.com/Volkswagen-Golf_IV--1.8T/Engine/Emission/Oxygen_Sensor/ES892/
please can someone tell me if these are the wrong way round please so i can get decent mpg again

many thanks in advance
Title: Re: 02 sensors wrong way round? please help
Post by: shaft69 on 09 April 2012, 13:36
Got virtually brand new Bosch after cat sensor if need one ony done  about 20miles. Wrong diagnosed and wouldn't take back.
Title: Re: 02 sensors wrong way round? please help
Post by: AaronGS on 09 April 2012, 14:07
They look right to me. I have the same one pre-cat as that picture.
Title: Re: 02 sensors wrong way round? please help
Post by: ukvolkswagger on 09 April 2012, 16:29
thank you i will try  change it tomorrow :cool:
Title: Re: 02 sensors wrong way round? please help
Post by: shaft69 on 09 April 2012, 18:14
My cars a AUM and sure my pre cat not same as on that pic, will check tomorrow though, one thing you'll know that pre cat sensor has prtective heat foil on loom other hasn't.
Title: Re: 02 sensors wrong way round? please help
Post by: topher on 09 April 2012, 18:41
What is the fault code?
Title: Re: 02 sensors wrong way round? please help
Post by: Wayne on 09 April 2012, 20:37
The pre cat lambda has a bigger plug, I know this from sorting mine the other week.