21 replies to this topic

[Branagorn]

Hello there Forum, After a leisurely, yet harsh drive over to the A4069 and back on the weekend (thank you for the suggestion pete-r). I have the pleasure of a new orange EML, and the OBD points to Catalytic monitoring and Oxygen sensors. This can be cleared, but reappears after giving the car a bit of heavy acceleration, results in judderyness and an inconsistent idle. I'm embellishing this story to help anybody else who may search for these things in the future. A brief chat with Nev and look up on here would suggest 1 or both of the lamda sensors need replacing. This research also suggests that 'cheap' sensors are not worth the hassle. From a previous thread, which is over a year old, somebody mentioned this. http://www.eurocarpa...gn=Sub Networks Which after applying a Bank holiday discount code comes out at around £70 (I suspect the full asking price is currently inflated to make it appear a better deal than it actually is). However in the part description, there is nothing at all to suggest it is for use on the VX220 Turbo engine. With that in mind, if you were me, which sensors would you be buying? The correct part number(s) would be nice, a direct link would be even better. Many thanks, Alex

[siztenboots]

what is the actual error code you see?

[ElizP987]

Hi

I have some good used OEM sensors, £18 each plus postage

[siztenboots]

the sensors will age and react slower , more likely wiring and plug damage will occur from modifications.

 

only the first lambda does anything useful and will trim the fuel adjustments over short and long durations

[Branagorn]

what is the actual error code you see?

I don't have the car nearby atm. But I can't recall if my obd app lets me see any further detail than that in the screenshot.

[tibby]

Maybe also look @ your MAF sensor/sparks/ coils (rough idle and juddering ) A oxygen sensor fault can also be triggered by a faulty Maf sensor. Grtz

[Johnboyhgt]

I just sorted out a turbo with oxygen sensor fault triggered, voltage was fixed at 40mv - new one fixed it. Sent from my SM-G903F using Tapatalk

[Ali87]

Wynns catalytic converter and lambda cleaner. £10 a bottle. Worth a try first

[siztenboots]

I just sorted out a turbo with oxygen sensor fault triggered, voltage was fixed at 40mv - new one fixed it. Sent from my SM-G903F using Tapatalk

 

Same , had a client in for a remap , and that was constant low voltage , gave them a spare lambda to fit.

[Branagorn]

So I think I might cry

Received the new sensors today. Went to replace, Precat came out without much trouble. Needed a hammer and a lever for the rear one. It came out looking like this.



Anybody had to overcome this. It's fair to say the thread will be shot. I don't know where to go from here.

[Nev]

First buy a thread cutter and try "cleaning" the existing thread, you may find you can clean it up well enough for the new sensor to bite in adequately.

 

If the boss thread is really buggered then a solution will be to take the car to an exhaust fabricators and ask them to cut it out and re-weld in a new one.

 

Edited by Nev, 06 September 2017 - 06:28 PM.

[Johnboyhgt]

generally as the exhaust is stainless and hard metal you should be able to re-tap the thread.  Try a local garage they might be kind enough to lend you a tap as this happens all the time.

Edited by Johnboyhgt, 07 September 2017 - 11:15 AM.

[Johnboyhgt]

Just like i had to do, a picture tells a thousand words.

 

New ones here, just use a lubricant, engine oil would do :https://www.rapidonl...a4aAmIyEALw_wcB

Edited by Johnboyhgt, 07 September 2017 - 11:27 AM.

[slindborg]

So I think I might cry Received the new sensors today. Went to replace, Precat came out without much trouble. Needed a hammer and a lever for the rear one. It came out looking like this. Anybody had to overcome this. It's fair to say the thread will be shot. I don't know where to go from here.

 

 

Looks like you are in luck, looks like its trashed the sensor thread and not the boss... M18 thread cleaner/tap and away you go. Although I will caveat that with, be careful with filings calling into the exhaust, but as its post cat you "should" be ok.

 

Decent new sensors should have a light dab of anti-sieze grease on the threads, if not then carefully apply the tiniest spot of copperslip of the like to prevent it happening again. Word of caution again, TINY bit!!! oils destroy the sensor bit, so things like using pentrating oil or shite like wD40 on a sensor with the view to using the sensor again is a bad move etc.

[Branagorn]

Sorted the thread problem. Installed the new sensors. Took her out for a run and.....problem persists. Next thing to try?

[Nev]

Sorted the thread problem. Installed the new sensors. Took her out for a run and.....problem persists. Next thing to try?

 

Find out the exact Pxxx code(s) you are getting and look them up and let us know.

 

Edited by Nev, 07 September 2017 - 08:25 PM.

[tibby]

disconnect the maf and take it for a drive.... It's only a 2 second job..

 

[Johnboyhgt]

 

Sorted the thread problem. Installed the new sensors. Took her out for a run and.....problem persists. Next thing to try?

 

Find out the exact Pxxx code(s) you are getting and look them up and let us know.

 

 

[Branagorn]

Any suggestions for OBD apps that will give me such information?  I'm running Dash Command (which wasn't free) for Iphone which dosent appear to be thorough enough to give me The codes, just what ive posted above.

 

Failing that I'm going to invite an Android friend over, see if we can find out.

[Nev]

You can buy a dedicated ODB2 code reader off eBay for about £15 - well worth it for the VX and any other cars you get. Try and get one that "claims" to work well of Opels.

 

I use mine to reset my codes and dash lights prior to MOT which saves me a fortune!

 

I'm sorry the new lamda's didn't fix your problem, seems strange based on what your app showed (red dots for the lambdas).

Edited by Nev, 08 September 2017 - 09:09 AM.