21 replies to this topic

[Mangham54]

Hey y'all.... Yet another problem with 4094!

I recently resurrected the topic involving changing to a VSE and subsequent EML light and error code P0141.

Well having not tinkered with anything exhaust related (or than giving it a wiggle last week to check for loose mountings) my car has started coughing up the P0141 error code "O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)" according to www.obdcodes.com ( http://www.obd-codes.com/p0141 ). Now before I go and buy a new rear Lambda sensor are there any particular parts of the wiring harness (not that I actually know what that looks like at the moment - but will learn) that I should check for being grounded (I presume this means earthed)?

Additionally what is the likelyhood of such a fault developing without any real trigger? Or could there be a more evil gremlin awaiting me like a failed Catalytic Converter or fcuked engine?

The fault only seems to appear after about 6-7mins of driving, usually 3-4 mins after the coolant temperature has settled to it's normal operating temperature (though to be honest it has only done it twice - out of a total of two journeys). The engine feels like it is running ok... no hesitation or suggestion that it is running in limp home mode. Also when I have cleared the fault code using my Scanguage I can drive the car home without the fault code regenerating.... This is the bit I feel most hopeful about, as surely is there was a more profound problem the two Lambda sensors would start fault logging like a pair of Vauxhall Technicians when they see the EML.

I have summarily been from helping Fab to empty his beleaguered shed, so therefore I cannot run my VX for a fiver . So will have to investigate who can go rob his shed whilst he is looking the other way with his Bottle of Red Wine.

Thoughts and advice would be most welcomed... oh and before I can actually get this fixed I still have a visit to KwikFit to sort to get the blasted locking wheel nuts off!

Many thanks... Chris M.

Edited by Mangham54, 16 August 2010 - 10:06 PM.

[Ouchie]

Additionally what is the likelyhood of such a fault developing without any real trigger? Or could there be a more evil gremlin awaiting me like a failed Catalytic Converter or fcuked engine?

Twice in 1 week...likely

My rear sensor failed when I changed the exhaust. All I did was unscrew it then screw into the new exhaust. That's all it can take to break the sensor. The front sensor was fine though

The fault only seems to appear after about 6-7mins of driving, usually 3-4 mins after the coolant temperature has settled to it's normal operating temperature (though to be honest it has only done it twice - out of a total of two journeys). The engine feels like it is running ok... no hesitation or suggestion that it is running in limp home mode. Also when I have cleared the fault code using my Scanguage I can drive the car home without the fault code regenerating.... This is the bit I feel most hopeful about, as surely is there was a more profound problem the two Lambda sensors would start fault logging like a pair of Vauxhall Technicians when they see the EML.

Ditto. Cold start + 5 mins or so driving = EML.
Replaced and fine since. It's a DIY job or fiver at mates rates.


If you want to rob Fabs shed you can do your own dirty work

Edited by Ouchie, 17 August 2010 - 10:31 AM.

[Crazyfrog (Fab)]

If you want to rob Fabs shed you can do your own dirty work

and won't sell to him
shed is lock when i am away

[techieboy]

shed is lock when i am away

[Winstar]

I have this problem too but just turn off all the time been told this wont affect anything.

Really need to get round to changing this

Where did you get your part mate and how much was it?

it doesn't the only problem comes if a more serious enigine problem occurs and you don't realise as the eml is already on.

Edit and NEVER buy 2nd hand or none OEM lambda sensors it just a false economy

Edited by Winstar, 17 August 2010 - 11:01 AM.

[Crazyfrog (Fab)]

[quote name='techieboy' date='17 August 2010 - 11:44 AM' timestamp='1282041885' post='1073725']

[/quote]

[/quote]

angry dog living in it

[Ouchie]

Part Number : 12567680
eBay : Link
It looked different to the one I removed so may not be OEM

Note: The wires are clipped to the chassis with cable clips that seem to be single use.

Edited by Ouchie, 17 August 2010 - 11:42 AM.

[Ouchie]

angry dog living in it

I would be angry if I was shut in the shed too

[Mangham54]

You really mean angry mouse don't you? Are did you set the Spaniels to work? To be honest it would probably be cheaper to buy new than pay petrol from Wakey to Kent and back!

[Crazyfrog (Fab)]

To be honest it would probably be cheaper to buy new than pay petrol from Wakey to Kent and back!

put it on the company as a business trip

Edited by FAB VX, 17 August 2010 - 12:22 PM.

[Mangham54]

To be honest it would probably be cheaper to buy new than pay petrol from Wakey to Kent and back!

put it on the company as a business trip

Can't really justify a 'business trip' to Kent when I teach apprentices in the Yorkshire and Humber region only.

However I am spamming my own thread here.... not right.

So in reality it is just a matter of replacing the sensor and hopefully bob's your uncle and I should be 'reet'. So is the EliseParts/EliseShop oxygen sensor tool worth the investment of £7-£8's? Or is the sensor easy enough to replace with either a decent ratchet-spanner or socket set?

Also before I go splashing the cash is it worth trying to identify whether there are any poor earths on the wiring harness and if so where at the points to check?

Edited by Mangham54, 17 August 2010 - 12:34 PM.

[Crazyfrog (Fab)]

Also before I go splashing the cash is it worth trying to identify whether there are any poor earths on the wiring harness and if so where at the points to check?

this is the vx problem ...find the fault
happend to me and it was a poor earth at the rear of the clam

[Mangham54]

I have this problem too but just turn off all the time been told this wont affect anything.

Really need to get round to changing this

Where did you get your part mate and how much was it?

it doesn't the only problem comes if a more serious enigine problem occurs and you don't realise as the eml is already on.

Edit and NEVER buy 2nd hand or none OEM lambda sensors it just a false economy

Well when I do order it will be an OEM one.... Short term pain should hopefully be a long term gain.

[Mangham54]

Also before I go splashing the cash is it worth trying to identify whether there are any poor earths on the wiring harness and if so where at the points to check?

this is the vx problem ...find the fault
happend to me and it was a poor earth at the rear of the clam

For a man that won't sell me anything you are pretty helpful Fab.... where is the earth at the rear of the clam you refer to?

[FLD]

The lamda tools are good but I found mine were F******** tight so I took the cat section off, put the lamda part in the vice and turned the whole cat section. Only just freed it off. You can get pikey lambdas off ebay for about 15 quid. Not sure if they're any good but maybe worth a punt?

[Ouchie]

Also before I go splashing the cash is it worth trying to identify whether there are any poor earths on the wiring harness and if so where at the points to check?

this is the vx problem ...find the fault
happend to me and it was a poor earth at the rear of the clam

For a man that won't sell me anything you are pretty helpful Fab.... where is the earth at the rear of the clam you refer to?

Middle undertray off, then low down on the chassis left hand side near the bulkhead (below the airbox)
Also some earth points around the engine too.

I used a big adjustable spanner and may have needed to slip a pole over the handle to get some extra leverage.
As it's probably dead then it wont matter if you soak the sensor in WD40 first. Just clean up the threads afterwards.

[Ouchie]

Part Number : 12567680
eBay : Link
It looked different to the one I removed so may not be OEM

Note: The wires are clipped to the chassis with cable clips that seem to be single use.

Can somebody venture a guess as to weather this sensor is OEM or generic. It was what I used and had the correct length wires.

[Mangham54]

Part Number : 12567680
eBay : Link
It looked different to the one I removed so may not be OEM

Note: The wires are clipped to the chassis with cable clips that seem to be single use.

Can somebody venture a guess as to weather this sensor is OEM or generic. It was what I used and had the correct length wires.

Did it also have the correct socket on the end? I beleive the OEM item should simple as simple as screwing in and then pluggin into the harness.

[Ouchie]

Part Number : 12567680
eBay : Link
It looked different to the one I removed so may not be OEM

Note: The wires are clipped to the chassis with cable clips that seem to be single use.

Can somebody venture a guess as to weather this sensor is OEM or generic. It was what I used and had the correct length wires.

Did it also have the correct socket on the end? I beleive the OEM item should simple as simple as screwing in and then pluggin into the harness.

Yep. Same everything, just didn't look exactly the same at the business end. But I can imagine Vaux changing supplier or design in the past 8 years.