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Noisy suspension and stiff steering

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Old Jun 27th, 2019, 15:34   #1
WarrenandZoe
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Default Noisy suspension and stiff steering

As above, I have a front end knock, on startup and over bumps, checked wishbones, trackrod ends, springs and all seem ok, also have intermittent heavy steering especially at low speed i.e when parking, have had RAC out and has found following codes,

Diagnostic Codes
RAC DIAGNOSTIC SYSTEM
System Type: ENGINE SYSTEM TEST/VALUES
Name: D5244T - EDC 15C11 - 2.4L - 120 (163)
DTC: 6805,Boost pressure regulation, incorrect flow
System Type: BRAKES
Name: ABS (BCM) - MARK 25
DTC: 0032,Wheel sensor LR, faulty signal
DTC: 0106,Faulty steering wheel or wheelsetting
DTC: A032,Stability function, too long stability regulation
DTC: A031,Communication, CAN bus
System Type: IMMOBILISER
Name: IMMOBILISER - DIAGNOSE (CEM)
DTC: 8F43,Relay, rear washer motor. Too low signal
DTC: 6C48,Transponder type, signal incorrect
System Type: SOUND SYSTEM
Name: AUDIO - AUD (AUDIO MODULE) (AUD)
DTC: 0003,Loudspeaker right front, signal missing
System Type: SOUND SYSTEM
Name: INFOTAINMENT - INFOTAINMENT MODULE (ICM) (ICM)
DTC: 1A57,Communication with phone module (PHM), signal missing
DTC: 1A52,Communication with antenna module (ATM), signal missing
DTC: 6C71,Audio module (AUD) not valid, incorrect signal
DTC: 1F20,Left keypad, activated too long
DTC: 1A51,Communication with audio module (AUD), signal missing
System Type: AUXILIARY HEATING
Name: ADDITIONAL HEATER - CPM (COMBUSTION HEATER)
DTC: 0,No trouble codes stored in the system
System Type: CENTRAL ELECTRONIC UNIT
Name: CENTRAL ELECTRONICS - CENTRAL ELECTRONICS (CEM)
DTC: 8F43,Relay, rear washer motor. Too low signal
DTC: 6C48,Transponder type, signal incorrect
System Type: CENTRAL ELECTRONIC UNIT
Name: REAR ELECTRONICS - REM (REAR ELECTRONIC MODULE) (REM)
DTC: 4F45,Parking assistance sensor 4
System Type: CENTRAL ELECTRONIC UNIT
Name: UPPER ELECTRONICS - UEM (UPPER ELECTRONIC MODULE) (UEM)
DTC: 0004,Siren, communication fault
DTC: 0083,Rain sensor, internal fault
System Type: AC SYSTEM
Name: CLIMATE CONTROL - CLIMATE CONTROL (CCM)
DTC: 0021,Air quality sensor, internal fault
DTC: 0019,Function button, activated too long
System Type: STEERING WHEEL ELECTRONICS
Name: STEERING WHEEL ELECTRONICS - SWM (STEERING WHEEL MODULE) (SWM)
DTC: 0003,High beam flash, activated too long
DTC: 001B,Carphone YES b

All have been erased except permanent ones - reverse sensor, air quality sensor and alarm ( not fussed about) does anybody have any idea what could be causing the noise? It happens when braking as well
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Old Jun 27th, 2019, 16:14   #2
SwissXC90
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Heavy steering sounds like insufficient power steering assist, which could be due to:
1. Oil low
2. Wrong oil
3. Pump failing
4. Pump belt slipping

Check all the above

As for suspension knocks: check also the torque rod mounted at the front bottom of the engine, this has rubber bushes and absorbs torque twists and vibrations of engine and gearbox.
The bushes wear and then you have metal on metal with a knocking sound that sounds like a suspension knock.
The good news is the torque rod is extremely easy to replace and can be done at home with a socket set in your driveway.

I had it happen on my D5 engine and feared all sorts of suspension issues but it was just the torque rod.
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Last edited by SwissXC90; Jun 27th, 2019 at 16:29.
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Old Jun 27th, 2019, 16:17   #3
WarrenandZoe
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Thanks for quick response, I suspected torque rod as I had issues on a previous V70 although sound is different, thing that made me think it could be this is the fact that it vibrates as soon as I put in in D when cold
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Old Jun 27th, 2019, 20:10   #4
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Check also the strut top mounts and spring seats...
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Old Jun 27th, 2019, 20:15   #5
WarrenandZoe
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Spring seats seem ok, will check top mounts
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Old Jun 28th, 2019, 13:47   #6
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Ok, I've been under the car today and the torque mount is just flapping in the breeze so have ordered a new one, also the rear right bush on the front subframe has a small amount of movement, are the poly inserts as good as they say?

https://rover.ebay.com/rover/0/0/0?m...2F362617105869
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Old Jun 28th, 2019, 14:07   #7
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Oh and how much side to side movement is acceptable on the prop shaft?
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Old Jun 29th, 2019, 13:28   #8
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Anybody tried the polyurethane inserts?
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Old Jun 30th, 2019, 11:38   #9
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Yes, the inserts are effective and straightforward to fit. You will need new bolts from Volvo as they are single-use stretch bolts (TTY).
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Old Jun 30th, 2019, 11:55   #10
WarrenandZoe
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Ah ok didn't know about the bolts, thank you
Are the bolts a must? The description of the inserts doesn't mention it, just remove bolt, put the insert in and put the bolt back in

Last edited by WarrenandZoe; Jun 30th, 2019 at 12:35.
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