Motor Control System Failure - Alfa Romeo Forum
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(Post Link) post #1 of 14 Old 29-07-15 Thread Starter
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Motor Control System Failure

Driving home today and MCSF displayed! Engine didn't die seems that there is a loss of power what can I do to diagnose the problem?
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Get the error code read.

Cheapo bluetooth ELM adapter and a free smartphone app is usually enough to read the engine ecu codes.
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The first time I had the engine management light I got the RAC out to read the code and reset it. Granted mine ran fine and it was an intermittent fault at that point. Might be worth a shot if you have breakdown cover, at least you'll know what the code is.
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(Post Link) post #4 of 14 Old 13-06-16 Thread Starter
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Hi

I know it's been a while but the MCSF went away and I was told that the codes could only be read if the warning light was illuminated. The MCSF has now displayed again and on checking the code it returns

P0236
Turbocharger Boost Sensor A - Circuit Range/Performance

Can someone tell me what this means?
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Mine did this today and stalled the car at low speed, mine is 3.2
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Quote:
Originally Posted by Wishiknew View Post
Hi

I know it's been a while but the MCSF went away and I was told that the codes could only be read if the warning light was illuminated. The MCSF has now displayed again and on checking the code it returns

P0236
Turbocharger Boost Sensor A - Circuit Range/Performance

Can someone tell me what this means?

remove and clean the map (mass air pressure) sensor as a starting point, very easy. carb cleaner to clean it and some basic tools to get to it, (its in the inlet manifold) next to the egr, its connected with a hex bolt , wiggle it out of the mani, clean thoroughly and put back...

30 minute job, if that. you are laughing either way as it will either fix it, improve it or rule it out as the issue allowing you to move on to the next most likely culprit. (The MAF.)
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Quote:
Originally Posted by Wishiknew View Post
Hi

I know it's been a while but the MCSF went away and I was told that the codes could only be read if the warning light was illuminated. The MCSF has now displayed again and on checking the code it returns

P0236
Turbocharger Boost Sensor A - Circuit Range/Performance

Can someone tell me what this means?
Codes can be read any time - if a fault has been displayed its stored in ECU memory....As well as the things Joey suggests, your current fault could well be something like sticky turbo vanes or some such - my 147 did this quite a bit when I first got it, but a degree of rather more spirited use seems to have sorted it. It could be something else, like a split turbo or vacuum hose, though.
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Originally Posted by vantastic mark View Post
Mine did this today and stalled the car at low speed, mine is 3.2
That sort of stalling could well be the start of a crank sensor failure......only time (and reading the codes) will tell
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That sort of stalling could well be the start of a crank sensor failure......only time (and reading the codes) will tell
MAF it would seem, on order
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(Post Link) post #10 of 14 Old 07-07-16 Thread Starter
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On further investigation the inlet turbo hoses is split!! Any thoughts as to the best place to get one?
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For the turbo hoses you could try shop4parts, autolusso or alfa workshop but it would be a good upgrade to go for the silicone hoses, they are a lot stiffer than the original type and will last a lot lot longer and give a bit better performance...
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(Post Link) post #12 of 14 Old 10-08-16 Thread Starter
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Well the hose has been replaced and I've not had the MCSF since!!!!! thanks for your help
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Originally Posted by Wishiknew View Post
Well the hose has been replaced and I've not had the MCSF since!!!!! thanks for your help

I didn't think an mcsf code was generated by a split hose. Maybe someone could confirm.



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I didn't think an mcsf code was generated by a split hose. Maybe someone could confirm.



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Could be if you hoof it...

When my VNT solenoid was dead and I couldn't get any high-boost I'd get a boost discrepancy MCSF and a load of smoke if I pointed it up hill and pressed the accelerator...

Big boost leak would give similar result.. Not as much pressure in the manifold as expected!
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