P0101 MAF range performance

**bebetositu** · 06-12-2018,03:30 PM

Originally Posted by Muckie1

Be interested to know if yours is the same problem

Hi, just spoken to my mechanic, he said no issue with the pressure sensor, and the IAT temperature was ok as he remembered, his guess would be the wires or the ECU fault, he referred me to an auto electrician.

**bebetositu** · 13-12-2018,03:26 PM

Originally Posted by Muckie1

Hi,
Did you run VCDS on it?
Take a look at mine earlier in the thread, I had IAT at 130C, do you have this too ?

I think P0101 covers a multitude of sins.
I changed the IAT/ Mass airflow sensor but it didn't fix my problem, anyway its new so I don't have to worry about it again.
The IAT temp at 130C was the clue, open circuit it is very low, short circuit it is high.
We removed the plug from the boost pressure sensor and the 130C reduced.
So changed it, that cured the problem once the fault codes were reset.
It also fixed the faulty fuel cap problem which was indicating a short circuit. And wouldn't lock.

Weird fault, Boost pressure sensor cost £30 but seems ok now

Hi Muckie1, the light not coming back anymore after you changed the Boost pressure sensor since June?

**Muckie1** · 13-12-2018,05:51 PM

Originally Posted by bebetositu

Hi Muckie1, the light not coming back anymore after you changed the Boost pressure sensor since June?

No light. All seems well.
After changing the BPS the inlet air temp was operating correctly and not stuck on 130C

**bebetositu** · 13-12-2018,09:04 PM

Originally Posted by Muckie1

No light. All seems well.
After changing the BPS the inlet air temp was operating correctly and not stuck on 130C

Where did you buy your BPS? Also, does your Mass air flow sensor have the Continental logo on it? please see photo:

I have been to my local garage quite a few times, they changed the MAF sensor and the IAT sensor, I only have the P0101 code left after both sensor changed, please see photo, I also have a mobile electrician visited twice, he checked the wires, but still no luck, he said he has ran the VCDS and the IAT is showed regular temperature, he still can not find the fault. I may still suggest them to change the BPS?

IMG_20181110_100052.jpg

IMG_20181212_170758.jpg

**Muckie1** · 13-12-2018,10:58 PM

The MAF is the same continental type as your picture.
The BPS came from my garage supplier.
I don’t think the BPS is too expensive, around £30, I’ve heard all sorts of weird problems happening, the BPS caused my fuel filler lock to show short circuit on the VCDS. No harm swapping it I guess, at least you will know whether it is that or not.

**bebetositu** · 14-12-2018,08:59 AM

Originally Posted by Muckie1

The MAF is the same continental type as your picture.
The BPS came from my garage supplier.
I don’t think the BPS is too expensive, around £30, I’ve heard all sorts of weird problems happening, the BPS caused my fuel filler lock to show short circuit on the VCDS. No harm swapping it I guess, at least you will know whether it is that or not.

Ok, the BPS is cheap, I am going to ask my local garage to change it to see if I will have any luck. Thanks

**bebetositu** · 14-12-2018,09:11 AM

Originally Posted by Muckie1

The MAF is the same continental type as your picture.
The BPS came from my garage supplier.
I don’t think the BPS is too expensive, around £30, I’ve heard all sorts of weird problems happening, the BPS caused my fuel filler lock to show short circuit on the VCDS. No harm swapping it I guess, at least you will know whether it is that or not.

Hi Muckie1, someone also suggested it might be the EGR Valve, see link belows, do you think it would worth a try on this after the BPS?

P0101 error, black smoke, holds back - AudiForums.com

**Muckie1** · 14-12-2018,12:19 PM

I considered the EGR valve for mine, I concluded it probably wasn't that as I had no difference in driving and I suspected that if the EGR valve was faulty I would notice in the way the car handled.
But who knows ?? This system is weird.
If you are at the point of swapping parts and hoping it fixes it, I'd go for the cheapest thing first.

**bebetositu** · 14-12-2018,03:04 PM

Originally Posted by Muckie1

I considered the EGR valve for mine, I concluded it probably wasn't that as I had no difference in driving and I suspected that if the EGR valve was faulty I would notice in the way the car handled.
But who knows ?? This system is weird.
If you are at the point of swapping parts and hoping it fixes it, I'd go for the cheapest thing first.

I don't see any difference in driving too, no black smoke from the exhaust, brake lights working fine, fuel cap lock working fine, I am going to change the BPS this afternoon, I will see how it goes.

**bebetositu** · 17-12-2018,08:58 AM

I went to the garage again to change the boost pressure sensor on Friday, but the guy told me that the IAT temp was at 130 C before changing the IAT sensor and the temp drop to normal after the IAT sensor changed, he ran a scan for me and shown me the temp was good, around 19 C something, all other data showing fine, can not see any problems with the car, only the P0101 code still there, so he said is no need to waste more money to change the pressure sensor, sensor returned. I am having a ECU remapping guy to come for a visit today, he will run a diagnostic, there might be a fault in the ECU, hope he could find it.