2007 XC90 Replaced ABS Sensor-DSTC Blinking with Power Loss

zakmuh · Nov 17th, 2021, 20:11

Evening,

I had DSTC and ABS lights on with Brake Assist Service Required message in my XC90. Scanned it and it was the faulty LF (left front) ABS sensor - no signal. Got the sensor replaced and cleared the codes.

No more lights or messages but when trying to move the car (going over 5mph) DSTC blinks with power loss and when stopping the car there is a kick-back in the pedal. So:

1. Tried driving turning DSTC OFF then the LF brake gets applied automatically-stopping the car moving.
2. Tried driving disconnecting the LF sensor - DSTC and ABS lights come on but car drives all fine
3.Checked the new sensor and the wires for any damages- nothing wrong externally.

Should brakes/ABS need aligning or calibrating..anything like that?

I'd highly appreciate if anyone could help me with this.

Zak

Simmy · Nov 17th, 2021, 23:08

have you checked the reluctor rings for cracks /splits?

zakmuh · Nov 18th, 2021, 06:43

Yeah Ive checked it, all okay. I tired putting back the old sensor then I get faulty signal as before

gmonag · Nov 18th, 2021, 09:48

Where did you get the new sensor? What part no?

SwissXC90 · Nov 18th, 2021, 09:57

Did you check all 4 wheels for constant and same wheel pulses?

All wheels must produce reliable wheel pulses.

zakmuh · Nov 18th, 2021, 13:22

Got the part from Eurocar parts. DO you think the new sensor is not compatible or faulty?

No I haven't checked the pulse yet.

tonygreen1966 · Nov 18th, 2021, 14:14

If replacing the original faulty sensor removes the DSTC issue then it does sound like you have a faulty new sensor. Was the new sensor damaged in any way when you removed it and put back in the original sensor?

tonygreen1966 · Nov 18th, 2021, 14:18

Meant to add that I've only replaced rear sensors before- 3 off- I used worldcarparts and they were all fine. I've had dodgy injectors,exhausts and other stuff from Eurocarparts!

zakmuh · Nov 18th, 2021, 17:23

Thanks for your replies all

I'll take it as a faulty new sensor. I should get one from worldcarparts then. I'll keep you posted

Cheers

zakmuh · Nov 25th, 2021, 17:17

Hi guys. I've got an update.

I replaced it again but this time with a Volvo sensor but still not solved - I'm getting the same DTC 011. Jacked up the car and did a close inspection. To me it looks like nearside reluctor ring is not exactly aligned with the sensor and I suspect the drive shaft has moved inwards? If I'm right on this, what could have caused this and whats the solution?

Please see the attached pic. I've done a comparison between both sides.

LF Sensor Comparison.jpg

Thanks in advance.

Nov 17th, 2021, 20:11	#1
zakmuh Junior Member Last Online: Apr 25th, 2022 11:15 Join Date: May 2016 Location: Nottingham	2007 XC90 Replaced ABS Sensor-DSTC Blinking with Power Loss Evening, I had DSTC and ABS lights on with Brake Assist Service Required message in my XC90. Scanned it and it was the faulty LF (left front) ABS sensor - no signal. Got the sensor replaced and cleared the codes. No more lights or messages but when trying to move the car (going over 5mph) DSTC blinks with power loss and when stopping the car there is a kick-back in the pedal. So: 1. Tried driving turning DSTC OFF then the LF brake gets applied automatically-stopping the car moving. 2. Tried driving disconnecting the LF sensor - DSTC and ABS lights come on but car drives all fine 3.Checked the new sensor and the wires for any damages- nothing wrong externally. Should brakes/ABS need aligning or calibrating..anything like that? I'd highly appreciate if anyone could help me with this. Zak __________________ 2007 (Mk I) Volvo XC90 SE 2.4D D5 - 199,617 miles. Silver, black leather interior.

Nov 18th, 2021, 06:43	#3
zakmuh Junior Member Last Online: Apr 25th, 2022 11:15 Join Date: May 2016 Location: Nottingham	Yeah Ive checked it, all okay. I tired putting back the old sensor then I get faulty signal as before __________________ 2007 (Mk I) Volvo XC90 SE 2.4D D5 - 199,617 miles. Silver, black leather interior.

Nov 18th, 2021, 09:48	#4
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	Where did you get the new sensor? What part no? __________________ Greg

Nov 18th, 2021, 09:57	#5
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	Did you check all 4 wheels for constant and same wheel pulses? All wheels must produce reliable wheel pulses. __________________ 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.

Nov 18th, 2021, 13:22	#6
zakmuh Junior Member Last Online: Apr 25th, 2022 11:15 Join Date: May 2016 Location: Nottingham	Got the part from Eurocar parts. DO you think the new sensor is not compatible or faulty? No I haven't checked the pulse yet. __________________ 2007 (Mk I) Volvo XC90 SE 2.4D D5 - 199,617 miles. Silver, black leather interior.

Nov 17th, 2021, 23:08	#2
Simmy Premier Member Last Online: Yesterday 23:24 Join Date: Mar 2017 Location: Manchester	have you checked the reluctor rings for cracks /splits?

Nov 18th, 2021, 14:14	#7
tonygreen1966 Member Last Online: Oct 7th, 2023 14:41 Join Date: Apr 2013 Location: UK	If replacing the original faulty sensor removes the DSTC issue then it does sound like you have a faulty new sensor. Was the new sensor damaged in any way when you removed it and put back in the original sensor?

Nov 18th, 2021, 14:18	#8
tonygreen1966 Member Last Online: Oct 7th, 2023 14:41 Join Date: Apr 2013 Location: UK	Meant to add that I've only replaced rear sensors before- 3 off- I used worldcarparts and they were all fine. I've had dodgy injectors,exhausts and other stuff from Eurocarparts!

Nov 18th, 2021, 17:23	#9
zakmuh Junior Member Last Online: Apr 25th, 2022 11:15 Join Date: May 2016 Location: Nottingham	Thanks for your replies all I'll take it as a faulty new sensor. I should get one from worldcarparts then. I'll keep you posted Cheers __________________ 2007 (Mk I) Volvo XC90 SE 2.4D D5 - 199,617 miles. Silver, black leather interior.

Nov 25th, 2021, 17:17	#10
zakmuh Junior Member Last Online: Apr 25th, 2022 11:15 Join Date: May 2016 Location: Nottingham	Hi guys. I've got an update. I replaced it again but this time with a Volvo sensor but still not solved - I'm getting the same DTC 011. Jacked up the car and did a close inspection. To me it looks like nearside reluctor ring is not exactly aligned with the sensor and I suspect the drive shaft has moved inwards? If I'm right on this, what could have caused this and whats the solution? Please see the attached pic. I've done a comparison between both sides. LF Sensor Comparison.jpg Thanks in advance. __________________ 2007 (Mk I) Volvo XC90 SE 2.4D D5 - 199,617 miles. Silver, black leather interior.

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