Engine: D5: - power loss engine service required

nickmcd · Jun 5th, 2009, 09:51

Hi All
Just bought a v70 D5 with 166k miles (not police), superb car and drives perfectly when cold. However after a few miles 2-3 once it appears to have warmed up it will continue to run fine until I take the revs over 2500, at which point it's as if there is a speed limiter on. Foot flat to the floor and no increase in speed or revs. It doesn't sound like the turbo is kicking in either. I suspect the wastegate is sticking open and understand there is a solenoid which activates this.
a) can anyone help with the issue?
b) can anyone advise where the solenoid is and what it looks like?
c) having done the key to '1' position hold trip button in till bleep then key to '2' I get a code of 045, can anyone advise what this relates to?P.S If I turn the engine off and restart the turbo works fine up to 2500 revs again then appears to cut out again.

Cheers
Nick

v8disco · Jun 5th, 2009, 10:31

Nick

before you do anything else, try changing the fuel filter.

I had the same symptoms as yours and a fuel filter change completely cured it.

Cheers

Martin

jackass · Jun 5th, 2009, 12:16

The boost controller is mounted on the front of the airbox, the wastegate is acctuated by vacuum which is modulated by the boost controller. Check the pipes for blockages.

Really you need to read the OBDII/CANBUS fault codes to find out what the car thinks is wrong. It sounds like it's going into limp mode, which disables the turbo, this may well be a boost control problem or could equally be a fuel pressure problem.

nickmcd · Jun 13th, 2009, 21:26

OK finally had a service (all filters etc changed) local garage, but still shoing limp mode fault. Checked codes on an OBD11 reader and read as follows:

P0144 O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
P0571 cruise control brake switch A circuit

do these mean anything to anyone and if so what do I need to do to renew or reset?

Also could these put the car into limp mode?

cheers

nick

Jun 5th, 2009, 09:51	#1
nickmcd New Member Last Online: Jul 12th, 2009 20:33 Join Date: Jun 2009 Location: bradford	power loss engine service required Hi All Just bought a v70 D5 with 166k miles (not police), superb car and drives perfectly when cold. However after a few miles 2-3 once it appears to have warmed up it will continue to run fine until I take the revs over 2500, at which point it's as if there is a speed limiter on. Foot flat to the floor and no increase in speed or revs. It doesn't sound like the turbo is kicking in either. I suspect the wastegate is sticking open and understand there is a solenoid which activates this. a) can anyone help with the issue? b) can anyone advise where the solenoid is and what it looks like? c) having done the key to '1' position hold trip button in till bleep then key to '2' I get a code of 045, can anyone advise what this relates to?P.S If I turn the engine off and restart the turbo works fine up to 2500 revs again then appears to cut out again. Cheers Nick

Jun 5th, 2009, 10:31	#2
v8disco Senior Member Last Online: May 25th, 2016 18:55 Join Date: Jan 2007 Location: Woking	Nick before you do anything else, try changing the fuel filter. I had the same symptoms as yours and a fuel filter change completely cured it. Cheers Martin __________________ 07 XC70 geartronic

Jun 5th, 2009, 12:16	#3
jackass Senior Member Last Online: Apr 15th, 2024 20:48 Join Date: Dec 2007 Location: Leighton Buzzard	The boost controller is mounted on the front of the airbox, the wastegate is acctuated by vacuum which is modulated by the boost controller. Check the pipes for blockages. Really you need to read the OBDII/CANBUS fault codes to find out what the car thinks is wrong. It sounds like it's going into limp mode, which disables the turbo, this may well be a boost control problem or could equally be a fuel pressure problem. __________________ Current: 2017 V90 D4 Inscription, Twilight Bronze Previously: 2003 S60 D5 SE Geartronic, 16.8s @80mph

Jun 13th, 2009, 21:26	#4
nickmcd New Member Last Online: Jul 12th, 2009 20:33 Join Date: Jun 2009 Location: bradford	OK finally had a service (all filters etc changed) local garage, but still shoing limp mode fault. Checked codes on an OBD11 reader and read as follows: P0144 O2 Sensor Circuit High Voltage (Bank 1 Sensor 3) P0571 cruise control brake switch A circuit do these mean anything to anyone and if so what do I need to do to renew or reset? Also could these put the car into limp mode? cheers nick

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