Advice required - Fault codes read

[jdavis]

Plugged my car into diagnostics today and got the following DTC fault codes:

ABS-00A2 Side accelerometer Faulty - known fault (suspect ABS module)

ABS-00A3 Side accelerometer Signal outside its permitted range - known fault (suspect ABS module)

CCM-0021 Air quality sensor Internal fault - known fault

CEM-6A01 Door unlocked, left rear Signal too high - kids messing with doors

CEM-6A02 Door unlocked, right rear Signal too high - kids messing with doors

ECM-1600 Boost pressure sensor - Signal too low - Suspect boost pressure sensor

ECM-170F Boost pressure sensor - Faulty signal - Suspect boost pressure sensor

ECM-261A Long-term fuel trim, bank 1 - Upper limit - Suspect first lambda sensor

ECM-262A Long-term fuel trim, bank 1 - Lower limit - Suspect first lambda sensor

ECM-644A Camshaft control - Faulty signal - Suspect VVT solenoid

What are your thoughts please guys?

[M-R-P]

Get the MAP sensor off it and give it a soak in some turps, I put mine in turps in the sonic bath I use for injectors - sorted it right out

I'd clear them all and see what comes back

[jdavis]

Was thinking of trying that but wasn't sure if it would make it worse. Biggest concern to me is the lambda sensor and vvt valve although I do have a spare valve.

[partsforvolvos.com]

the air quality sensor is the little fan that requires a hoover on it, if i am correct martin?

doors- could be the kids but these are common to see if it plays up. have you ever locked it to find they bounced back up without locking?

is the side accelerometer anything to do with yaw for the dstc system? the yaw sensors do play up a lot.

the lambda sensor may or may not be affected by the boost pressure problem so maybe one could fix the other. the front lambda sensor (bank 1) is more common to play up than the rear .

[M-R-P]

Air quality sensor could also be the one in the cabin air inlet under the windscreen but hoovering the little vent in the heater control unit won't hurt. You should be able to hear the little fan running behind the vent.

[Harvey]

Air quality sensor could also be the one in the cabin air inlet under the windscreen but hoovering the little vent in the heater control unit won't hurt. You should be able to hear the little fan running behind the vent.

The air quality sensor lives under the scuttle panel inside the main fan housing for the heater.

[silverhorse]

That's a good list of faults you've got there!!!
Nothing majorly serious though I don't think. Like Martin says, get them cleared and see what comes back. You may find that many of the codes are old and have just been stored and the problem had gone away.
Worst case scenario, you need a few new sensors.
Air Qual sensor is the one that reads the air coming into the cabin via the air con. Once it is ££££ed, it is ££££ed. There is no cleaning it. They ALL go wrong and don't make much difference to your everyday life. But they are silly money

[thebadger]

Often it's one code that can trigger another in a kind of cascade of faults.

I once had to spend 30mins with my mechanic trying about 6 different approaches to clear a bank of about 8 codes that all got thrown due to some over zealous cleaning by a valet company. They had pulled a socket under the passenger seat & had set the ECM into a code throwing melt down. Every code we sorted chucked another 2 up.

All that from one airbag related code. So don't get too worried, more than half my raft of codes were false and had no bearing on what was actually at fault.

[jdavis]

doors- could be the kids but these are common to see if it plays up. have you ever locked it to find they bounced back up without locking? It has the genuine accessory blinds in the back and sometimes they catch on the pin and stop it unlocking

is the side accelerometer anything to do with yaw for the dstc system? the yaw sensors do play up a lot. Yes it's showing the accelerometer under the centre console although trying to find a replacement is difficult, looks like i may have to stump up the money from Volvo

the lambda sensor may or may not be affected by the boost pressure problem so maybe one could fix the other. the front lambda sensor (bank 1) is more common to play up than the rear .I've tried cleaning the Boost pressure sensor as Martin advised, not sure if it's cleared it though

The air quality sensor lives under the scuttle panel inside the main fan housing for the heater.That's the one, not replacing that though, refuse to pay that money for what it is and what it does.

That's a good list of faults you've got there!!!
Nothing majorly serious though I don't think. Like Martin says, get them cleared and see what comes back. You may find that many of the codes are old and have just been stored and the problem had gone away.
Worst case scenario, you need a few new sensors.
Air Qual sensor is the one that reads the air coming into the cabin via the air con. Once it is ££££ed, it is ££££ed. There is no cleaning it. They ALL go wrong and don't make much difference to your everyday life. But they are silly money I have cleared them and after a few hundred miles they all came back lol. Looks like i'm going to be emptying the piggy bank.

Thanks guys

[M-R-P]

Well at least you have some handy starting points. If you find the exact location of the accelerometer and what it looks like, I'll check the scrappy for ya.

[silverhorse]

Well at least you have some handy starting points. If you find the exact location of the accelerometer and what it looks like, I'll check the scrappy for ya.

Have you got your own private quarters in that scrappy!!!

[M-R-P]

Have you got your own private quarters in that scrappy!!!

It's good for browsing

[jdavis]

Martin its in the picture pointing under rear storage box of centre console, item number 5. part number is 8622414
if you manage to find one that would be great
thanks

[M-R-P]

Oh, so that's what that wire is for

I'm looking at a P2 V70 on friday, I'll see what I can find

[jdavis]

Oh, so that's what that wire is for

I'm looking at a P2 V70 on friday, I'll see what I can find

thanks Martin if you could get as much as you could from under there i can check them against mine if i ever figure out how to get to them easily

[M-R-P]

There's a trick to getting all that lot off, I did it when I wrapped my trims.

I'll try and remember.

I think I'll need a pic of the bit that goes between the seats (stereo back) but iirc, there's screws on the sides, in the cubby hole and in the cup holder. You also need to remove the gear stick and handbrake gators.

[jdavis]

There's a trick to getting all that lot off, I did it when I wrapped my trims.

I'll try and remember.

I think I'll need a pic of the bit that goes between the seats (stereo back) but iirc, there's screws on the sides, in the cubby hole and in the cup holder. You also need to remove the gear stick and handbrake gators.

Any good to you mate?

[M-R-P]

Remove handbrake gator, roll gear stick gator up.
remove side panels (12)
remove screws under pen holder (2)
remove screws (51, 52, 53) and then screw (30)
and I think there's screws in the sides of the main unit, near the footwell (not noted here) it should all lift off and you just need to feed the gear stick surround through the hole.

[jdavis]

Thanks for that Martin

further information on the DSTC accelerometer fault
ABS-00A2 Side accelerometer Faulty signal
Frozen values from initial readout
Supply voltage -High
Velocity reference -0 km/h
Brake light switch -Off
Pump -Off
Brake disc temperature front left -573 °C Seems excessive??
Brake disc temperature front right -114.6 °C
steering direction -Left
Steering wheel angle velocity -0 °/s
Supply voltage AYC sensor>= -4.75 V
Acceleration reference -0 g
Yaw rate sensor 1, yaw rate direction -Right
Yaw rate sensor 1, signal -0 V
Yaw rate sensor 2, yaw rate direction -Left
Yaw rate sensor 2, signal -2.34 V
Active control function -None
AYC Active booster status -Not activated
DSTC function -Enabled
Lateral accelerometer sensor, accelerating direction -Right
Lateral accelerometer signal -0.94 V
Pressure sensor 1, brake pressure -bar
Pressure sensor 2, brake pressure -bar
Steering wheel angle, steering direction -Right
Steering wheel angle -0 °
Pedal pressure sensor status -Off

Can anyone confirm if this still seems to be an accelerometer sensor fault of faulty ABS/DSTC ECU?

[M-R-P]

Brake disk temp?

how the hell can it measure that?

It reads like the 4-C system is toast mate but I have almost no knowledge on the thing.