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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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XC90 trio of fault codes.Views : 634 Replies : 3Users Viewing This Thread : |
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Apr 16th, 2018, 17:53 | #1 |
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Last Online: Apr 27th, 2023 06:40
Join Date: Jun 2007
Location: Swansea
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XC90 trio of fault codes.
Recent problem with my 2010 XC90, D5.
Had the system check message couple weeks back, read and it was oil sensor (level too high), and cam position sensor. Cleared, 300ml oil drained. Ok for 200 miles then today engine system check, and cam position sensor, o2 sensor, and MAF sensor. Are the other two faults connected to cam position by any chance? Car recently serviced, oil, filter, air, fuel filters. My plan was to change cam position as quite reasonable and go from there, any other ideas? The car drives well, a very slight momentary loss of power when fault code triggered then OK. |
Apr 16th, 2018, 19:39 | #2 |
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Last Online: Mar 20th, 2024 18:26
Join Date: Jan 2016
Location: Cross Country
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Look for air leaks first.
It is extremely statistically unlikely for all 3 sensors to "fail" at the same time, so you have something else which is pushing their values out of tolerance. Log the data of the engine when running, especially all parameters around the inlet induction side
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
Apr 17th, 2018, 21:12 | #3 |
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Last Online: Apr 27th, 2023 06:40
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Location: Swansea
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I think you are onto something there.
It looks like the charge/intercooler pipe has worked out, and hissing under acceleration. It was removed recently when the main dealer changed the angle gear. I know from experience they need a bit of gentle persuasion to get in correctly! |
Apr 18th, 2018, 05:23 | #4 | |
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Last Online: Mar 20th, 2024 18:26
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Quote:
Inspect it carefully for cracks and ensure all joints are airtight Especially the orange silicon joints where the pipe under the engine connects to the resonator which goes up to the turbo charger, and the same where the resonator connects to the turbo. The slightest leak in the charge air pipe upsets the air flow volume, and the ECU starts to make wrong calculations about air volume and fuel volume, and compensate wrongly, and thus all sensors readings start to become inplausible. So extremely likely that the sensors are OK and you have a charge air leak
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
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