v70 engine surging

greengoblin · Dec 23rd, 2012, 13:11

Hi all newby here, very new at this i have purchased a 1999 v70 2.4 xt full un marked leather a real bute 2 days ago, got in it this morning and it decided to stall at a round about it will not start unless i use the gas peddle and it idles eratic had rac out and the codes are. po300 p1672 po135 its done 183881 full service history up to 159000, cambelt changeg at 169000 it drove so nice im hoping its not going to be costly any help would gratefull. colin

deathrider311271 · Dec 23rd, 2012, 16:41

Quote:

Originally Posted by greengoblin

Hi all newby here, very new at this i have purchased a 1999 v70 2.4 xt full un marked leather a real bute 2 days ago, got in it this morning and it decided to stall at a round about it will not start unless i use the gas peddle and it idles eratic had rac out and the codes are. po300 p1672 po135 its done 183881 full service history up to 159000, cambelt changeg at 169000 it drove so nice im hoping its not going to be costly any help would gratefull. colin

P0135 Front heated oxygen sensor (HO2S) preheating Faulty signal. Permanent Fault

P0300 Misfire At least one cylinder

P1672 Power supply 5 volts Signal too low. Intermittent Fault

Did the RAC guy reset the codes? if so hows it running now? if still the same get the codes read with Volvo software as this will determine where the real problem lies. But looking at those codes i would assume you have at least 2 faulty sensors

capt jack · Dec 23rd, 2012, 16:59

That's bad luck.

What engine is it? If it's a VVT engine then P0300 is a misfire code. P0135 I think means that the front O2 sensor isn't happy, and P1672 I think means that the camshaft reset valve isn't functioning properly.

The three are very probably all linked to a single fault.

Try this link: http://www.volvoforums.org.uk/showth...ighlight=P1672

You could just try disconnecting the battery for twenty minutes and see if this clears things. It might do, but if there is a fault then the codes and the light and the running issue will come back.

Did you get the car from a dealer? If so then you need to get it back - even at 13 years old, a second hand car from a dealer should go for a bit more than three days!

Jack

greengoblin · Dec 23rd, 2012, 17:22

no bought it private, i have no warning lights on managed to get car home i took plugs out and need new set the electrode is bearly noticable cleaned plugs and it fired up and drove perfect when i come to stop the revs go down to 500 then rise to around 800, and no nothing was reset to be honest he wasnt a lot of good he said it was an air leak i had to ask him more than once to plug his laptop and he said its found some fault code not impressed where is the p0135 sensor,

Luxobarge · Dec 23rd, 2012, 17:23

You may well have nothing more than a dodgy earth for the ECU - I think they terminate around the driver's side headlamp IIRC - reason I say this is the last code, low ECU voltage - if the whole ECU is not getting the right voltage then it could cause it to throw all sorts of codes when in fact nothing is really wrong with any of the sensors.

That's what I'd check first, at any rate.

Cheers

capt jack · Dec 23rd, 2012, 17:29

Good advice from Luxo there.

Also, does the engine management warning light come on when you switch on and then go straight off when you start the engine? If not then I reckon that someone has removed the bulb.

The hunting idle is caused by the ECU getting trying to correct what it sees as a fuel mixture problem. This may be down to a faulty sensor - it's the front O2 sensor which is in the exhaust down-pipe.

It may indeed be down to a vacuum leak somewhere on the intake side, or it may be down to the bad plugs you've found causing a misfire, which the causes the O2 sensor signal to be confused by the unburnt fuel in the exhaust.

You need to get to the bottom of this because a bad misfire can destroy the cat in short order.

It could be a faulty coil pack on one cylinder too.

Checking earth connections and a new set of spark plugs seems to be a good place to start I reckon.

Jack

greengoblin · Dec 23rd, 2012, 20:01

what does the managment light look like

big_yin · Dec 23rd, 2012, 20:19

management light

yorkipud · Dec 23rd, 2012, 20:21

Its a picture of an engine righthand bank of warning lights 2nd in from the right on the bottem row.
i think.

greengoblin · Dec 23rd, 2012, 21:02

ignition on and surprise surprise no managment light, feel like ive bought a wrongan

Dec 23rd, 2012, 13:11	#1
greengoblin New Member Last Online: Jan 16th, 2013 22:00 Join Date: Dec 2012 Location: essex	v70 engine surging Hi all newby here, very new at this i have purchased a 1999 v70 2.4 xt full un marked leather a real bute 2 days ago, got in it this morning and it decided to stall at a round about it will not start unless i use the gas peddle and it idles eratic had rac out and the codes are. po300 p1672 po135 its done 183881 full service history up to 159000, cambelt changeg at 169000 it drove so nice im hoping its not going to be costly any help would gratefull. colin

Dec 23rd, 2012, 16:59	#3
capt jack VOC Member Last Online: Jun 20th, 2024 22:14 Join Date: Jun 2006 Location: Selby, North Yorkshire	That's bad luck. What engine is it? If it's a VVT engine then P0300 is a misfire code. P0135 I think means that the front O2 sensor isn't happy, and P1672 I think means that the camshaft reset valve isn't functioning properly. The three are very probably all linked to a single fault. Try this link: http://www.volvoforums.org.uk/showth...ighlight=P1672 You could just try disconnecting the battery for twenty minutes and see if this clears things. It might do, but if there is a fault then the codes and the light and the running issue will come back. Did you get the car from a dealer? If so then you need to get it back - even at 13 years old, a second hand car from a dealer should go for a bit more than three days! Jack Last edited by capt jack; Dec 23rd, 2012 at 17:01.

Dec 23rd, 2012, 17:22	#4
greengoblin New Member Last Online: Jan 16th, 2013 22:00 Join Date: Dec 2012 Location: essex	. no bought it private, i have no warning lights on managed to get car home i took plugs out and need new set the electrode is bearly noticable cleaned plugs and it fired up and drove perfect when i come to stop the revs go down to 500 then rise to around 800, and no nothing was reset to be honest he wasnt a lot of good he said it was an air leak i had to ask him more than once to plug his laptop and he said its found some fault code not impressed where is the p0135 sensor,

Dec 23rd, 2012, 17:23	#5
Luxobarge Premier Member Last Online: Today 12:18 Join Date: Jan 2011 Location: Horne (Nr. Horley)	You may well have nothing more than a dodgy earth for the ECU - I think they terminate around the driver's side headlamp IIRC - reason I say this is the last code, low ECU voltage - if the whole ECU is not getting the right voltage then it could cause it to throw all sorts of codes when in fact nothing is really wrong with any of the sensors. That's what I'd check first, at any rate. Cheers __________________ Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs.

Dec 23rd, 2012, 20:01	#7
greengoblin New Member Last Online: Jan 16th, 2013 22:00 Join Date: Dec 2012 Location: essex	. what does the managment light look like

Dec 23rd, 2012, 17:29	#6
capt jack VOC Member Last Online: Jun 20th, 2024 22:14 Join Date: Jun 2006 Location: Selby, North Yorkshire	Good advice from Luxo there. Also, does the engine management warning light come on when you switch on and then go straight off when you start the engine? If not then I reckon that someone has removed the bulb. The hunting idle is caused by the ECU getting trying to correct what it sees as a fuel mixture problem. This may be down to a faulty sensor - it's the front O2 sensor which is in the exhaust down-pipe. It may indeed be down to a vacuum leak somewhere on the intake side, or it may be down to the bad plugs you've found causing a misfire, which the causes the O2 sensor signal to be confused by the unburnt fuel in the exhaust. You need to get to the bottom of this because a bad misfire can destroy the cat in short order. It could be a faulty coil pack on one cylinder too. Checking earth connections and a new set of spark plugs seems to be a good place to start I reckon. Jack

Dec 23rd, 2012, 20:21	#9
yorkipud Junior Member Last Online: Aug 21st, 2013 16:59 Join Date: Mar 2011 Location: Aberdeen	Its a picture of an engine righthand bank of warning lights 2nd in from the right on the bottem row. i think. __________________ Volvo V70 T5 2000reg white.... V40 1600 98reg black...part ex'd for v70

Dec 23rd, 2012, 21:02	#10
greengoblin New Member Last Online: Jan 16th, 2013 22:00 Join Date: Dec 2012 Location: essex	. ignition on and surprise surprise no managment light, feel like ive bought a wrongan

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