Yes another post on...the Lambda Probe/Sensor, exhaust/pre-cat one I think!

[53 Leon SX]

Ok, I have searched for info, been on ross tech but can't find most of the codes so I'll try keep this Short. Engine Management light is on showing excess pollution or whatever the manual refers to it as. Had a diagnostic check at a local Skoda garage and it came up with the following:

17604 (not on ross-tech)
O2 Sensor Heater Circ., Bank1-Sensor 1, Electrical malfunction, Intermittent

17586 (not on ross-tech)
Linear Oxygen sensor/pump current, Open circuit, Intermittent

17589 (not on ross-tech)
Linear Oxygen sensor/reference voltage, Open Circuit, Intermittent

16825 (found info on ross-tech but it means nothing to me)
EVAP Emission Contr.Sys.Incorrect, Purge Flow, Intermittent

I'm guessing the first 3 codes all point to a new lambda probe (guess being the vital word there) on the exhaust or pre cat is that right?

What does the last code mean?

I have a 1.6 if that makes any difference. Thanks for any help

 

[Pyro]

defo new lamba for first three dunno anout the last

 

[Slimy]

I believe the pre cat lambda sensor is the one that gives the closed circuit for the emissions, if that is faulty then none of the system will work properly. That last 'emission control system' error may be a symptom of the lambda sensor being FUBAR.

Personally I'd swap it out, reset the codes then go from there. They're not overly expensive, and as long as you can get access it's only a ten minute job. If a garage charges more than half an hour labour I'd be going somewhere else. I'd recommend Sere motors for getting one, I got my last one from them and he sorted me out with an almost unbelievable price.

 

[8bit]

Correct me if I'm wrong (not you, Pyro ) but doesn't "open circuit" mean that there's a fault in the cabling between the sensor and the ECU? Could be that the cable connected to the sensor has come loose, have read of this happening...

EDIT - am just kidding Pyro

 

[Pyro]

Tour correct 8bit but think a broken sencor can also through the code up but don't quote me on that but it could well be a broken wire or something like that

 

[gezmeister]

I am also thingking a wiring problem. I'm more or less 99% sure my lambda is goosed, but that shows up as a Bank 1: Too rich fault code, whereas the above codes don't relate to it running rich

 

[Slimy]

I seem to remember my goosed lambda sensor also came up with the open circuit message, my local garage attempt at cleaning it broke the internal heater. A simple swap sorted it.

I don't know whether you could test the wiring before you go for the sensor, I suppose at the very least you can check to see if the connections are still there? The fact that it's the heater and the sensor circuit broken would sugest to me that it's either a failed connection or a sensor. A single wire failure wouldn't cause errors on both sides?

 

[Pyro]

Unless the wire breaks for both but I do remember mine gad this code and after a good clean and check of all the wires a new sencor was the fixer

 

[53 Leon SX]

Cheers guys, its much appreciated!

Just had to check as the few garages I've been to, both VAG group and independent have quoted £200 or near enough. One even tried it and said usually both are on the way out when that happens so I should replace both for £400...to which I replied I don't think so mate and departed swiftly. My reasoning is if I need both changing then I'll wait until the car says so. If there wasn't snow all over the place I'd buy a trolley jack and have a look myself at the cables but it'll have to wait a bit, I haven't been driving in the snow at all anyway.

Do you mean sere motors in Ireland Slimy?
Are the two sensors the same btw? I'm guessing I should get the lambda direct from seat/skoda etc not a universal one off of ebay, I heard they can cause trouble?

On a totally unrelated note would a lcr splitter fit on a 1.6? Seen someone on here with it but can't find them again to ask!

 

[Pyro]

Theres a good guide for fitting lcr splitter to standard leon if you use the search button

You don't have to use seat or skids for parts sere motors on here us pretty cheep if not the likes of GSF and euro car parts are recommended not really eBay IMO

 

[Slimy]

Yep, don't use Ebay unless you are absolutely 100% that it is a Bosch or NGK original replacement. And even then, I bet Sere will beat the price!

The two sensors aren't the same, so make sure you ask for the pre-cat sensor. £200 per sensor is ridiculous, I had a quote to replace both of mine for that price. It might work out cheaper for you to buy it from Sere and get it fitted. I can't remember what Sere charged me, the original quote for the post-cat sensor was £106 but there had been a replacement issued so I'm fairly sure it was around half that price in the end.

And yes it is Sere Motors in Ireland, but the guy you contact to order the parts is an absolute star and the parts arrive amazingly fast. My local SEAT dealer can't get the stuff to them as fast as Sere gets them to my door!

 

[Pyro]

I payed £25-£50 for pre-cat from GSF and got a mate to fit it

 

[gazrhys]

i have a 1.6 all the same codes when my lambda went get a new one asap your car will be running wrong mine was then my cat went the garage said my car was running rich becaose of this and slightly melted my cat which made it loos and rattle

 

[53 Leon SX]

Found it now Pyro cheers. Turns out the key word to include in the search is "guide" lol

Already checked euro car parts as it happens and their online function came up with no part being held but I'll ring them as one is very close to me. GSF is very cheap, compared to what I've been quoted anyway but no where near £25- £50 I'm interested to see what these sere motor guys can do since you're promoting them so well. You don't get commission off their sales or anything do you Slimy

Yeah gazrhys the fuel consumption is crap at the moment due to it running rich. At least I have an idea of what it would be like to own a cupra, if only fuel wise that is lol

 

[gazrhys]

also when when uve had it done i would check the spark plugs they wil be blackened may be useful to get some new ones whilst ur at it

 

[Slimy]

I'm interested to see what these sere motor guys can do since you're promoting them so well. You don't get commission off their sales or anything do you Slimy

Haha, no there's no commission involved! Do a search through the forums, I doubt you'll find one bad word said against them.

 

[53 Leon SX]

gazrhys thanks for the advice, I'll have a look when I'm back at home.

Right Slimy I had a look in at sere motors and they gave me the respectable quote of £106 for the pre-cat sensor. A good 33% cheaper than everywhere else thats given me quotes. GSF came up with £56.60, not sure if that includes VAT and I have yet to contact Euro car parts.

 

[53 Leon SX]

Right Euro car parts was £99 for the 4 pin probe and £148 for the 5 pin one which isn't the one that's causing the problems I don't think so GSF car parts it is. Thanks for all the help and suggestions everyone.

 

[flares]

I had the 17604 fault code twice this time last year when it got colder & cleared it both times & it also came up a few weeks ago when I had a knackered temp sender . No probs since changing it though

 

[53 Leon SX]

Yeah the light just comes on and off, so may be the wiring only but seeing as its probably reached its end of life cycle I'll just replace it