S80: Engine Problems won't go away. What else could there be?

[venomtail]

So my S80 was in a dire state. Loved the car and decided to bite the bullet and get it repaired.

• Replaced brakes
• Wheel bearing
• New tires
• Complete transmission change
• Complete engine oil change
• New alternator
• New maf sensor
• A full swirl cap kit replacement
• Actuator arm replacement
• Soot filter proffesionally cleaned
• And likely something else that I've forgotten

and after all of this, my car STILL will barely run in a sort of limp mode state with a more than average white smoke (or is it steam? Maybe from leftover chemicals used to clean the soot filter?), and has an "Engine system Service urgent" message on the dashboard. No check engine lights. My 2 OBD2 readers also says everything's fine as doesn't read any error codes.

My mechanic said that after I get the filter cleaned I should go back to him so he can do a quick 5 minute one last check just so nothing else pops up but sadly he's gonna have more work cut out for him.

Does anyone have the slightest suggestion as in what could be going wrong? What is there left to do? Could it literally just be a computer glitch that's causing all of this?

I've spent so much money on it I will never be able to sell it and even get a quater of the value. Kinda hopeless. But incase I have no other options but to sell it, what does a limp mode running S80 go for? £200? £300?

[Kev0607]

1. Are you losing any coolant, or is there any oil in the coolant reservoir or a white gunk on the oil cap? White smoke is an indication of a blown head gasket, as the coolant or oil is entering the combustion chamber causing white smoke/steam.

2. Cracked cylinder head could cause white smoke

3. You could have an injector issue, as too much fuel is being added to the combustion chamber & that can also create white smoke because the fuel isn't being burned properly because there's too much of it.

You need VIDA/Dice (Specific software for Volvo's) & do a diagnostic check with that. A Volvo dealership or Volvo independent specialist will have this software, as normal OBD readers don't always show fault codes. VIDA will do a full check of all the modules in the car & should flag any underlying issues.

[seanc]

Diesel or petrol?
Does the engine idle smoothly?

[Gazdkw]

If you can get to Leicester I can run diagnosis on it. It may shed light on the cause

[venomtail]

Originally Posted by seanc

Diesel or petrol?
Does the engine idle smoothly?

Diesel. Yes the engine idles smoothly or at least I think it does. It's been so long the last time I drove it and fixed it I'm forgetting what it should sound like.

Originally Posted by Kev0607

1. Are you losing any coolant, or is there any oil in the coolant reservoir or a white gunk on the oil cap? White smoke is an indication of a blown head gasket, as the coolant or oil is entering the combustion chamber causing white smoke/steam.

2. Cracked cylinder head could cause white smoke

3. You could have an injector issue, as too much fuel is being added to the combustion chamber & that can also create white smoke because the fuel isn't being burned properly because there's too much of it.

You need VIDA/Dice (Specific software for Volvo's) & do a diagnostic check with that. A Volvo dealership or Volvo independent specialist will have this software, as normal OBD readers don't always show fault codes. VIDA will do a full check of all the modules in the car & should flag any underlying issues.

Originally Posted by Gazdkw

If you can get to Leicester I can run diagnosis on it. It may shed light on the cause

So I went to the local volvo mechanic and the car still had DPF error codes still. Saying that the filter is full, the temperature sensor threw an error as well as the pressure sensor. Will go to a mechanic who cleans the DPF filters proffesionally as well as replace the 2 sensors.

Can really a full sensor make my car go in limp mode where it struggles to get uphill? One full DPF filter to cripple a car seems like a really extreme safety measure?

There are no other errors on the car other than my 1 parking sensor not working but that's the least of my concerns.

Booked the car in in 2 weeks time and then hopefully I'll update you on what's happened. Been a really long grind trying to get this car repaired for the last 8 months.

[nalla]

hi did your dpf get reset on the car ie like when you have a service.
I read some where that the dpf counters have to be reset back to zero.
I could be wrong but its worth a look .

[venomtail]

No I have not had the possibility of reseting the computer as all garages/services are still shut/don't reply to my calls/voicemails.

But I'm still trying to get booked in. Non of my scanners work so I need to get a volvo one specifically so I can't do anything on my own.

[ShadeTek]

No forum members near you with Vida?

[mr tickle]

white smoke/black smoke does sound like a fuel delivery issue. (I agree with maurice mynah) - I would double check your fuel filter and make sure its a genuine volvo one.

I had no end of issues with my engine and after a long time found out my in tank fuel pump was failing, the clue was the fuel filter was out of shape (vacuum). A sticky vaned turbo is a good shout too.

As you are after suggestions, I just thought I would throw it in the mix for your consideration, its not a diagnosis.

[Simmy]

Originally Posted by venomtail

So my S80 was in a dire state. Loved the car and decided to bite the bullet and get it repaired.

• Replaced brakes
• Wheel bearing
• New tires
• Complete transmission change
• Complete engine oil change
• New alternator
• New maf sensor
• A full swirl cap kit replacement
• Actuator arm replacement
• Soot filter proffesionally cleaned
• And likely something else that I've forgotten

and after all of this, my car STILL will barely run in a sort of limp mode state with a more than average white smoke (or is it steam? Maybe from leftover chemicals used to clean the soot filter?), and has an "Engine system Service urgent" message on the dashboard. No check engine lights. My 2 OBD2 readers also says everything's fine as doesn't read any error codes.

My mechanic said that after I get the filter cleaned I should go back to him so he can do a quick 5 minute one last check just so nothing else pops up but sadly he's gonna have more work cut out for him.

Does anyone have the slightest suggestion as in what could be going wrong? What is there left to do? Could it literally just be a computer glitch that's causing all of this?

I've spent so much money on it I will never be able to sell it and even get a quater of the value. Kinda hopeless. But incase I have no other options but to sell it, what does a limp mode running S80 go for? £200? £300?

multiple soot filter messages can throw up a tcm code which can put the car in limp mode . th this can only be cleared with a top quality scanner or vida.