Help - P004900 Overboost and hesitation

RAN60 · Jul 5th, 2017, 11:24

Hi all, need some help.

I have an S60 D3 2011 163hp which has developed a fault when accelerating mostly in higher gears. When overtaking in 3rd, just before the car reaches 3000rpm, the car seems to hold back on the power suddenly and cautiously brings it back to full revs.

There are no warning messages on the car and the below images are the stored error codes.

I was getting a DPF pressure sensor readings erratic message also, but this hasnt come back in last few days.

Any help would be very much appreciated!!

RAN60 · Jul 5th, 2017, 11:26

Managed to get the freeze frame data for the fault if anyone can make sense of it!

muffking · Jul 5th, 2017, 21:37

The MAP sensor is pretty common on these if that helps.

RAN60 · Jul 6th, 2017, 14:43

Just as a follow up and thank you to muffking, had the car diagnosed today at FRF Swansea and it was the boost pressure sensor that was faulty.

They have replaced the sensor down by the intercooler and all seems back to normal now!

Strangely enough, they told me that they dont usually keep parts like that in stock, but had 2 on the shelf. Definitely looks like a common issue then!

muffking · Jul 6th, 2017, 20:32

Another one to add to the list of those on here who have changed theirs then.
Strangely I have one going spare too

volvo for ever · Jul 7th, 2017, 06:48

T-map sensor on intercooler

muffking · Jul 7th, 2017, 07:24

MAP sensor -
Volvo part 31303974
BOSCH part 0261230294

spitz · Oct 9th, 2018, 19:18

Hi, to bump an old thread I had very similar symptoms in my D3 V70. However, the problem turned out to be a small split in the hose connecting to the inter cooler. In my case the sensor mentioned previously was correctly flagging the pressure loss in the hose. I don’t now how much the sensor itself costs, but as the hose is North of £100 I imagine it won’t be any cheaper! So anyone else experiencing this issue may want to check their hoses first.

Special thanks also to Volvo Assist for identifying the issue in just over an hour, including the 30 minutes it took them to get out to me.

volvo for ever · Oct 12th, 2018, 06:36

Sure you'd get maf code if charge hose split and under boost?

Jul 5th, 2017, 11:24	#1
RAN60 Master Member Last Online: Mar 30th, 2024 07:50 Join Date: Jul 2009 Location: Wales	Help - P004900 Overboost and hesitation Hi all, need some help. I have an S60 D3 2011 163hp which has developed a fault when accelerating mostly in higher gears. When overtaking in 3rd, just before the car reaches 3000rpm, the car seems to hold back on the power suddenly and cautiously brings it back to full revs. There are no warning messages on the car and the below images are the stored error codes. I was getting a DPF pressure sensor readings erratic message also, but this hasnt come back in last few days. Any help would be very much appreciated!!

Jul 5th, 2017, 21:37	#3
muffking Senior Member Last Online: Dec 29th, 2018 13:04 Join Date: Jan 2015 Location: Lincs.	The MAP sensor is pretty common on these if that helps. __________________ V60 SE Lux Nav, converted to R-Design body style. See https://farm5.staticflickr.com/4230/...3474bbba_b.jpg

Jul 6th, 2017, 20:32	#5
muffking Senior Member Last Online: Dec 29th, 2018 13:04 Join Date: Jan 2015 Location: Lincs.	Another one to add to the list of those on here who have changed theirs then. Strangely I have one going spare too __________________ V60 SE Lux Nav, converted to R-Design body style. See https://farm5.staticflickr.com/4230/...3474bbba_b.jpg

Jul 7th, 2017, 07:24	#7
muffking Senior Member Last Online: Dec 29th, 2018 13:04 Join Date: Jan 2015 Location: Lincs.	MAP sensor - Volvo part 31303974 BOSCH part 0261230294 __________________ V60 SE Lux Nav, converted to R-Design body style. See https://farm5.staticflickr.com/4230/...3474bbba_b.jpg

Oct 9th, 2018, 19:18	#8
spitz Member Last Online: Today 08:00 Join Date: Nov 2013 Location: Chipping Norton	D3 same issue Hi, to bump an old thread I had very similar symptoms in my D3 V70. However, the problem turned out to be a small split in the hose connecting to the inter cooler. In my case the sensor mentioned previously was correctly flagging the pressure loss in the hose. I don’t now how much the sensor itself costs, but as the hose is North of £100 I imagine it won’t be any cheaper! So anyone else experiencing this issue may want to check their hoses first. Special thanks also to Volvo Assist for identifying the issue in just over an hour, including the 30 minutes it took them to get out to me.

Jul 5th, 2017, 11:26	#2
RAN60 Master Member Last Online: Mar 30th, 2024 07:50 Join Date: Jul 2009 Location: Wales	Managed to get the freeze frame data for the fault if anyone can make sense of it!

Jul 6th, 2017, 14:43	#4
RAN60 Master Member Last Online: Mar 30th, 2024 07:50 Join Date: Jul 2009 Location: Wales	Just as a follow up and thank you to muffking, had the car diagnosed today at FRF Swansea and it was the boost pressure sensor that was faulty. They have replaced the sensor down by the intercooler and all seems back to normal now! Strangely enough, they told me that they dont usually keep parts like that in stock, but had 2 on the shelf. Definitely looks like a common issue then!

Jul 7th, 2017, 06:48	#6
volvo for ever Premier Member Last Online: Feb 4th, 2023 15:10 Join Date: Apr 2015 Location: uk	T-map sensor on intercooler

Oct 12th, 2018, 06:36	#9
volvo for ever Premier Member Last Online: Feb 4th, 2023 15:10 Join Date: Apr 2015 Location: uk	Sure you'd get maf code if charge hose split and under boost?

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