Andrew

I see!

Error code was P0237 again - Turbocharger Boost Sensor "A" Circuit Low. I need to arrange a visit to Swindon soon I think.

That's something I need to check this weekend.

So a month has flown by and the car's done it again! The cleaning lasted all of a month, time for some more cleaning. It makes me think the entire system, turbo and all could probably do with a clean.

That sounds bad. Hope you are able to get it sorted. I'm not convinced the premium diesel is worth the extra. I've found my car runs smoother with a shot of 2 stroke oil in the tank..only a drop mind.

I've given the car a bit more of a test now, I think the power is spot on, compared to what believe to be a mapped E46 Compact 320td Sport and they make around 180bhp+ and 290lbft ish. My Alfa has 100kg less weight compared the the BMW which was noticeable. I dare not do any further tests, can't afford to break anything. Smacky..when you say that can be arranged..?

The cleaning helped lots, the car has more power and so far it's not gone in to safe mode. I've been steady with it but did it a good clean out heading down the golden valley bypass and was surprised with the improved acceleration. so far so good, I need a 'private test track' as well!

I know what you mean.. I've seen one that looked furry it was so coated blackness. It can't hurt cleaning it though.

I second that! I wish I could cycle to work!

Got the can today and took the MAP sensor off.. Fairly dirty, gave it a good spray loads of blackness came out for quite some time. Will refit tomorrow. (phone pics..hands were too dirty for DSLR)

I did a search for motor factors in Cheltenham, only GSF came up and their site didn't list it, so for £4 it will arrive at my door today (only 200ml though). Handy to know there is a Eurocarparts in Swindon - although the far side. I think I'm fairly close to you when I'm in work near Siddington. I will get the sensor cleaned this weekend and then go from there. I do need to speak to you with regard to where I should be taking my car really.

Thanks Smaky! I've ordered a can from Amazon. I will report back, I'm sure it's going to be dirty considering the state of the EGR recently.

Cheers, I think something to do with the cut and paste! I did try to fix it.

Hi All, I've slowly been getting all of the problems with my 147 JTD Q2 resolved, some have cost me quite a lot of money. Hopefully this one not so much... For some time now when driving in a spirited manner lets say 4000rpm ish the car goes in to safe mode and the turbo cuts out. Turn off and back on resolves it, but the engine light stays on and the code reads P0237. The garage I've been taking my car to say it happens every time at 3000milibar and I should speak with the company that provided the remap. So I've contacted them, very helpful as it turns out, they tell me: "0237 points to the MAP sensor being either faulty or reading out of range. What it should do is send information back to the ECU regarding the pressure change in the intake manifold when the accelerator pedal is depressed (and subsequently the pressure is created by the turbo). The ECU uses this info to prevent overboost. There should be a 5v feed to the sensor, the sensor will then send a signal back to the ECU that can be measured with an oscilloscope or even a good diagnostic . The ECU then monitors the boost pressure from this to check for a voltage outside of the operational range against the predicted value it was expecting. The boost pressure being delivered should match the boost pressure being demanded in the mapping, i.e. if it requests 3000mb then it will expect 3000mb, its not a case of the mapping demanding 2800Mb and getting 3000mb so it cuts out as it wouldn't demand any more if that makes sense. Other things that could possibly trigger this are a sticking waste gate which is so very common on the 1.9 8v and 16v engines." I've seen this code asked about quite a lot on another forum and very little answers provided, so I though I would post it here and will look forward to reading any comments on it.

Cheers! No problems at the moment with the car. However they tend to only be around the corner..I will take a look through all the existing threads in the coming days.