V70 d5 185bhp 2006 please help this frustrated engineer

[davebb]

Atmospheric
Actual boost
what are these readings now with the car not running,
what is your local Atmospheric reading from accuweather , in your town, now
Dave

[davebb]

your Pressure: 1021.00 mb is now accuweather,
if you are still getting 996mb then yes you need to change the sensor in the ecu, but could be a dry joint on the sensor, but I would say change it , if you can, or clone the ecu,

[Clan]

Originally Posted by Boona575

Hi all

New to forum, bought myself a 185bhp d5 2006 AWD estate


So here goes

The faults/codes are
Play in steering
PDC issues (has front and rear)
Needed a service
Output signal 5th injector faulty
Boost pressure fault signal
Atmospheric pressure fault signal
Swirl flap actuator code

What I have done
Steering inner ends
Full service
Swirl flap Actuator repair and adapt values

Front bumper off new sensor for PDC
Rear bumper Tormorow as showing needs a sensor too for PDC

Leaves me injector, boost and atmospheric all saying faulty signal

The car runs well then goes into limp mode with no boost this is occasionally and beside that runs I would say well

I believe the injector is a separate issue to the boost and atmospheric. The latter 2 being the cause of limp mode
so fitted a genuine MAP sensor which goes into the Intercooler
Codes and fault remain
Although the boost reading is slightly higher with the engine off than with the original map sensor

I've checked the boost controller and cleaned it
Checked the vac lines to the engine mounts, cooler appears ok too. Turbo seems to spool well and plenty power except when in limp of course

So leaves me to believe that the atmospheric sensor is at fault which is located within the ECU?

Please help guys this is frustrating I've tried using live data
Atmospheric is at 996 which to me is actually vacuum and so maybe wrong

Can get you any details you may need and am not too shabby with the spanners or a meter. My scanner is not Vida although is very good on almost anything

Thanks in advance

You need a new boost sensor in the intercooler outlet stub , left side of car low down ..

The injector will need new wiring terminals which volvo sell, if it still occurs a new injector needed but the terminals usually work ...

[Boona575]

hi the car has had a new MAP/boost sensor.
this is what i changed first.
its the atmospheric reading that is the odd ball

anyone know who can repair the ECU or where to get a known working one.

are they plug and play

thanks guys, for your input. you all thought on same lines as me.

yes i believe on the injector your correct there too. terminals dry, if not injector replace.

cheers

ill update you with the results

[Boona575]

oh quick question where is the ECU on the car, i thought it was drivers side of engine bay, its a RHD. confused i just see a PS reservoir and a space thats empty. thanks.

[davebb]

Hi is it were the air filter is on your year?
Dave

[Clan]

Originally Posted by Boona575

oh quick question where is the ECU on the car, i thought it was drivers side of engine bay, its a RHD. confused i just see a PS reservoir and a space thats empty. thanks.

The ecu is on top of the air filter casing , you see the wires going into it .

Have you got 3 atmospheric pressure sensors ? the latest cars have 4 ! this makes it easier to compare the readings to find the faulty one .

There is one in the ECU , one on the intercooler outlet stub , and in your case you might have one on top of the inlet manifold as well .
In the last 5 years there have been quite a few boost sensors on the intercooler going out of specification . The most reliable is the one in the ECU I have never come across a faulty one .

The ECU is coded to the car and holds the immobiliser codes , however you might be able to change the internal atmospheric sensor if the cost of the Used useless ECU is reasonable . However i would be very surprised if that sensor is faulty .

Talking of looking up your local atmospheric pressure . I have my doubts , at this moment outside is supposed to be 1026 mb ,, when i look on my weather station it says 1029 mb .. the actual figure on the car does not matter , what matters is that they are all reading the same at least to the nearest digit or two .

[Boona575]

hi yes i actually lifted it off when i did the filter change..... doh.

obvious thing become less obvious when your looking for difficult stuff.

interesting clan...
the map sensor in the intercooler was replaced with a genuine volvo item. the boost figure it gives is actually slightly higher than the previous one, however it doesnt match the atomospheric one which reads 996 regardless of when i have gone into live data.

i wonder if the ecu repair/change is a waste of time, maybe i can open it up?

am coming from literally hoards of bmws of various types, am a hydraulic engineer by trade, so bear with me on this volvo knowledge.

am just stumped as to what to do next, however i will get the terminal kit ordered.

[Boona575]

oh if not mentioned before the codes are 1000 and 1600 irrc

actually says faulty signal atmospheric, faulty signal boost pressure.

if anyone can explain how i post pics up on here i can show you the codes and live data. if needs


cheers chaps

[Clan]

Originally Posted by Boona575

oh if not mentioned before the codes are 1000 and 1600 irrc

actually says faulty signal atmospheric, faulty signal boost pressure.

if anyone can explain how i post pics up on here i can show you the codes and live data. if needs


cheers chaps

why not get the ecu repaired , there are various specialists around , at least you know what the trouble is ..