P3 (V40II, V40CC, S60II, V60, XC60, V70III, XC70III, S80)

Got the air con repaired. There was a wiring fault.

VOLVO XC70 2010 year

FYI It's a B4204T19 the 190 HP 2.0T VEA engine

Hello,

Did you get this figured out?
I'm going to need to do this shortly, and I'm curious if VDASH can actually clear this, everywhere else you need to bench it and clear it.

I take it no one is able to help.

@T5-T6-Schnappi Hallo,

mittlerweile sind alle Fehler am Fahrzeug verschwunden und es ist nur noch ein einziger Fehler vorhanden.

Könnten Sie mir bitte Informationen zu diesem Fehler geben? Was muss ich jetzt tun?
WhatsApp Image 2026-07-25 at 21.55.07.jpeg

Thank you mate just did that hope you guys can help Im kinda desperate at this point 😅

@reeferjon What did you use to get this code? That's no Volvo/VIDA format. And that P200500 code is not present in VIDA for the ECM of your car. Scan the car with Vdash or VIDA.
Vdash is no diagnostic software. You can still try live data reading via the ecu diagnostic function of Vdash, but you will need to use a Super J2534 adapter or a really, really good DICE clone for this. Other adapters are to slow for this.
There should be at least 3 different ECM values that you can monitor. Demanded throttle position, and two values for the 2 sensors. Demand and sensors should show similar values.

You can also use VIDA, which you can get in the depths of this forum, and perform a throttle activation via the ECM to test it's function while the engine isn't running. I'm not sure if Vdash also has that function, as it is not made with diagnostics in mind and therefore lacks lots of such functions.

As your code seems to be airflow related, have you already checked your MAP sensors? Like this? Your car has two of these sensors. One in the plastic pipe between the throttle body and the intercooler. And one as shown in the article I've linked. Both tend to get clogged and create lots of codes like MAF errors or low airflow codes.
If there is lots of carbon buildup on the sensors, cleaning the throttle body and MAF is also a good idea.

Ach stark ☺️

Danke dir schonmal für die hilfreichen Tipps.
Wenn ich aus dem Urlaub zurück bin, werde ich direkt das CEM checken und die Steckverbindung an der A-Säule höher der Klappe des Handschuhfachs hinter der weißen Abdeckung.

Werde mich danach nochmal bei dir Rückmelden.

@330hpwagon I'm not sure if your car supports HDC. The official manuals mention HDC only from model years 2015.5 onward as this feature was officially introduced with the Cross Country models and is activated by default on these models only.
To use HDC you have to manually shift to 1st gear or R. You can't activate it when in D or above 7 km/h.
VIDA doesn't mention anything about specific hard- or software that has to be installed or that this function is only available from a specific structure week like other functions like ERS.
The DTCs in your BCM are also all yellow which means they are temporary/historic/not active while the others in red are permanent. The first one in the CEM is from LED bulbs at the license plate and can be ignored. The others should be the ones that you want to adress.

Why exactly do you even want to activate this function? I have a V60CC with this function and never felt the need to go downhill with less than 10 km/h.

@VolvoAugust The only way to get the pin is on the bench. You won't get information how to actually do this in this forum. The guys that know how to do it, usually don't share their knowledge to the public.

Thank you so much for your answer! I was told that and it was werid when I saw the message in vdash.
I will contact the vdash support, maybe they can help me with this issue.

I would suspect a defect wheel speed sensor, corroded sensor ring at one of the wheel bearings, or low battery voltage.
Put the car on a lift and check the signals of all sensors with an oscilloscope. The sensors could still be working, but the sensor rings could miss one or more teeth which results in sending nonsense signals to the BCM.

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@T5-T6-Schnappi Thanks for the advice. The error code I’m getting is P0420, related to the catalytic converter. My engine has recently undergone an overhaul, with the pistons replaced due to oil consumption. Since the rebuild, the engine doesn't behave like it used to— there’s a tingling sensation on the steering wheel, and it feels like I’m driving a diesel.

Besides the comfort issues, fuel consumption has increased to about 9.5L/100km (before the repair, I averaged 7.5L/100km). Now (20 000km after rebuild) I’m also getting errors related to the lambda sensors. I know that the mechanic unfortunately didn't assemble the engine according to the official Volvo procedure—they didn't use the required locking tools and just relied on timing marks. Therefore, I am certain the balance shafts are incorrectly installed, but I’m also worried about the timing and the VVT settings.

I also know that this car can be quite tolerant of certain issues... for instance, when I had a faulty PCV system, no error code appeared, even though the crankcase pressure was clearly compromised.