1999 Auto V70 Engine Runs Like a Pile of Rocks

[Chris_Rogers]

I've had a look at the wiring diagrams and there is one relay that is common to the engine management and the auto transmission.
This (main relay) 2/32 in the wiring diagrams is located in the fuse/relay box behind the air filter, it is shown as the right hand of the row of 4 relays.
Failure if this relay is also mentioned in the xmodem link I gave earlier in the thread.

It's a bit of a guess but it could be a poor contact on this relay causes low voltage to the engine management & transmission systems when the engine ECU askes for the cooling fan to run putting some extra load on the circuit.

I'd suggest you remove this relay and open it up, look for a dirty contact inside. Also look at the 5 smaller fuses in this box and check for poor connections.

[Pozzouk]

Originally Posted by Chris_Rogers

You are having fun with this car!

Have you given any thought to loading the Volvo software onto your Autel unit? This should give the Volvo codes which should give better information.

Incidently I think you still have the wrong fluid in the gearbox.

Interesting you should mention the Volvo software supplied with the Autel - It lists many an engine type such as mine the B5244S2, but if I try to run it the machine tells me that the device can not communicate with the car - I have tried all the different years models and engine No.s and none will communicate so have only really been able to use the basic OBD11 readings.

Will check those fuses and relays in the morning & and give the Autel another big prod.

On an electrical note i have noticed there is a flicker in the interior lights and i'm noticing it when the sidelights are facing the inside of our wooden gates - could this be relevant and if so where should i be testing for voltage irregularity???

Errr about the box fluid????

I think i had better get it on a low loader and drop it down to Kent or perhaps a trip to Blackpool.........Tin Hat On!

Cheers.

[Pozzouk]

Originally Posted by TXC

Okay you may be getting fed up with me banging on about these O2 sensors, but...

I think there's a dam good chance your autel is giving only half the story, a proper scan with the right gear may land you right on the issue first hit, and i think that time is coming.

You can prove or disprove my thoughts by back probing the signal wire of each sensor if you dont want to disconnect, this will prove if the autel is mixing up the two sensor identifications, or if, in fact they are misplugged.

Save me from the Main Stealers! How do I go about this back probing.

I don't have a problem disconnecting - I guess just a matter of unplugging the front one and then take a look at the live data on the Autel for the missing feed?

[960kg]

Every piece of information helps!

The gearbox will never work properly on an auto if the engine is playing up etc.

I have been there and done that with my 960 and the cause of it all were cheap Universal O2 sensors fitted by a garage.

I went to Volvo and they replaced them with the pucker items and the transformation was amazing and the gearbox corrected all it errors on it`s own as the engine was now running as it should with the torque in the correct place at the right revs. and throttle position.

As said you don`t have to listen to anyone but Every Little Helps you decide what the problem is.

I would forget the gearbox and get the engine sorted first then move on.

Good Luck

[TXC]

As far as testing these sensors, I think it was Chris who peviously mentioned the front sensor being a wide band unit, difficult to test/interperet, this is correct, my previous claim that it had to be be standard seems disproved.

The sensor can still be tested, however it involves a bit of studying, and a bit of faffing around with jumper wires etc, so..

I re-read some of this thread, and you mentioned things did seem virtually solved for a few days after the sensor was replaced, so, assuming you have the capacity to clear any codes that are set whilst testing, disconnect them both and run it up with everything else connected.

The rear sensor, in my stubborness, still should not be switching, at least at a constant throttle or idle.

[Pozzouk]

Originally Posted by TXC

I re-read some of this thread, and you mentioned things did seem virtually solved for a few days after the sensor was replaced, so, assuming you have the capacity to clear any codes that are set whilst testing, disconnect them both and run it up with everything else connected.

The rear sensor, in my stubborness, still should not be switching, at least at a constant throttle or idle.

Sorry another essay!!!

I can see where you are coming from TXC - makes sence.

Yesterday could not get the car more than half a mile without ending up in safe mode, so to get home cleared the codes and she staggered back to base camp......very clunky not right when moving from drive to reverse and back.

Having seen 960kg's advice this morning i decided enough was enough and called the local Volvo dealers, very decent they sounded tooooo and happy to read codes for £40 quid!!!!...............only, having admitted that my bother had cleared the codes last night with the Autel, he politely pointed out they would not even be detectable with their equipment once wiped.......Therefor.

I concluded to take the car out and break it this morning! Damn thing took 15 miles of racing up and down the hill and going around the roundabout before she stumped up some codes and one of those was new to me P0032 plus a usual P1618 and 1672...........neither of the P0717 or P0716 have appeared since i took out the input sensor and wiped it over.

Have taken out all of the relays and they all look shiney new........from what i could tell taking out the Air Condition relay made no difference - not sure it is actually working - i'm sure it used to make a clicking noise when parked on the drive........anything in that i wonder???

So now i have codes to display and hope to book it in for the morning although as a point of interest when i spoke to the dealers this morning they thought i should take it back to the gearbox garage!!!!

I don't know.

Thanks everyone for trying so hard - gee i'm gonna need a new keyboard at this rate!

Best Regards
Pozzouk.

[960kg]

Did you know that your new error code POO32 is the following and relates to a faulty front O2 Sensor!

[Chris_Rogers]

"Have taken out all of the relays and they all look shiney new...."

Did you open the case of the main relay and look at the contacts?

[Pozzouk]

Originally Posted by Chris_Rogers

Did you open the case of the main relay and look at the contacts?

Can't say i did, as it looked to be in mint condition but come day break i will investigate further - I trust they come apart easy enough with due care and attention?

[Pozzouk]

Originally Posted by 960kg

Did you know that your new error code POO32 is the following and relates to a faulty front O2 Sensor!

Good Morning 960kg

Having only replaced that front sensor with DOX1419 as supplied by Camberley Auto Factors in July, the last thing i expected to hear was that might be part of the problem........Growl........

Thanks for illuminating me to the fact, as i had literally run out of time to check that code daft as that may sound - like it only cropped up for the first time yesterday, although others had been suggesting there was a problem with those sensors.

Got to work today so will be out testing as instructed Saturday morning.

Thanks as ever Guy's.