BMW and M Power Owners

Can anybody shed light on the meaning of these fault codes please?

(CB) Fuel Trim Bank 2 Control Limit

(CA) Fuel Trim Bank 1 Control Limit

Not sure what the codes were read with, these are what were written down and handed to me.

It also had these showing...

(41) Camshaft Signal Input

(08) Mass Air Flow Sensor

After clearing the codes, both the fuel bank codes above flag up again once the engine is started.

Both parts (MAF and Cam Position Sensor) have been replaced and the codes cleared without reoccurrence though.

Just wondering what the first two point toward?

Car is a 2000 e39 530i Sport Auto.

Thanks.
 
slick rick said:
Scania, did you check the rubber intake boot for tares when the MAF was replaced?
Was a genuine MAF used?
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Yes, removed it complete from the car and had a good look around it, no cracking nor tears that I could see.

The MAF was a Siemens VDO, which ,afaik, is OEM, part number 434110590 from Euro Car Parts.
 
Yeah that is an OEM part so that shouldn't be an issue.

AFAIK those codes are usually from unmetered air getting in or a vacuum leak.

Has the CCV valve and pipes been replaced at all?
 
A lot of people here like the 1 series but honestly it has never appealed to me in anyway.

The 1 series coupe or 2 series what ever it's called now is quite nice though which I really like.

Still a very nice car and I bet it's mad fast :D
 
slick rick said:
Yeah that is an OEM part so that shouldn't be an issue.

AFAIK those codes are usually from unmetered air getting in or a vacuum leak.

Has the CCV valve and pipes been replaced at all?
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The ccv hasn't been touched, no, not felt the need as of yet, it idles perfectly, used to stall a lot but the new cam position sensor cured that outright, it's not stalled or shown a sign of since.

I'm going to pull it all apart later (the engines hot at the mo) and have another close look at the pipe you referred to earlier.

Thanks for the input mate. :)
 
Scania said:
The ccv hasn't been touched, no, not felt the need as of yet, it idles perfectly, used to stall a lot but the new cam position sensor cured that outright, it's not stalled or shown a sign of since.

I'm going to pull it all apart later (the engines hot at the mo) and have another close look at the pipe you referred to earlier.

Thanks for the input mate. :)
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No problem, hopefully you can spot the issue, on my car it was quite obvious but it can happen in places where it is much harder to see.

Let us know how you get on with it and good luck! :)
 
Just spotted an E46 M3 with an LPG conversion on the bay. Initially shocked by the idea of LPGing an M car, surely if you're going to buy an M3 the fuel cost isn't high on your list of concerns.
But the more I think about it, the more it sounds like a brilliant idea.. Also whoever buys it will likely get it bloody cheap too as I suspect most people looking for an M3 wouldn't touch it with a barge pole.

I'm not intending to bid either way, but out of curiosity, am I missing out on down sides to an LPG M3??
 
It sounds like a crap idea, you need to do big miles for it to be worth the faff and if you do big miles why ruin one of the few remaining good E46 M3's for that sort of usage? On a Motorway trip it's no different to a 318Ci, seems pointless.
 
Unless I'm being a berk!... It's a bit rough round the edges, brapped black badging, black grilles/vents and carbon wrap in the cabin, and the condition of the seats looks a bit tired too.

The exhaust looks aftermarket, I suspect it will make a boomy sound as is stereotypically the case with cars that undergo the above mods. The wheels have also been re-finished in a grey colour judging by the pictures in the ad and the Wintrac tyres come to under £600. What tyre garage charges over £200 for fitting/balancing to account for the £800 he's quoted in the ad!

Also as it's a 2003, I imagine the TV won't work fully as it's analogue (later models >2004 are DVB iirc).

No mention of subframe inspection either and no mention of what service level is due next.
 
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But what do you mean by the faff?
Using my own situation as an example, live close to a petrol station which sells LPG and do under 10,000 miles a year including a commute (country A roads).
I'm not 100% sure of the cost difference but I suspect it would be similar or cheaper than the 318is I currently do that in, and with more than double the performance.. Doesn't sound too crap of an idea to me as it stands. :p

mrk said:
Unless I'm being a berk!... It's a bit rough round the edges
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It does look a bit rough, and not exactly a low milage example to begin with.
If I were in the market to buy it, it would have to be mostly returned to standard (bar the LPG) and given some much needed cosmetic and mechanical TLC before I was happy. All costs which I would have needed to consider, maybe some high ones if it were due an inspection2.
 
I appreciate that, but buying it for less in the first place because its LPG, and then running it for less because its LPG. Might be a very substantial saving over a long term ownership. All while enjoying a notoriously brilliant car.

Surely, there must be more actual cons to it rather than it just being a bit more of a faff to fill up..
 
Well yes the con of buying a shed that needs a significant amount of work to fix...i.e. subframe issues, engine issues etc.

These weren't cheap cars new and if they go wrong they can still cost significant money to fix.
 
LPG conversions tbh are usually botched crap installed by people who don't have much of a clue. I own one so I have some experience of this along with a couple of friends who have had them. It's not too bad on something which is essentially nothing special anyway, but to take a finely tuned piece of engineering and then let Bob's dodgy conversions take over the tuning and injecting a fuel it wasn't made to run on? No thanks.
So along with dodgy tuning losing you power, the fuel itself will lose you power, possibly eat into the valve seats, and the massively heavy tank will upset the balance of the car.
 
Of course the usual concerns of buying an E46 M3 still prevail, and I understand that the maintenance costs of the car are still relative to its original price. But this aside really, I'm just wondering if there are any solid reasons why an LPG M3 a no no.

Clarkey, I'm also working on the assumption that the seller is truthful in his listing:
"This is a recently converted car (2013), done professionally by an LPGA approved Autogas installer and it's on the UKLPG register under its recently removed private plate, which is L33 SNK. Please feel free to check on their website. This is very important for your insurance company and it also means that it hasn't been LPG converted by a monkey in a shed. It's been converted using probably the best Prins Sequential LPG system that you can currently buy. Because it's been fitted by professionals, there are NO warning lights on the dashboard and it runs beautifully on either petrol or LPG. Unless you're the STIG, I guarantee that you will not notice if this car is running on gas or LPG...........apart from in your wallet."
 
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