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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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Random loss of powerViews : 1083 Replies : 11Users Viewing This Thread : |
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Oct 27th, 2021, 19:45 | #1 |
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Location: Plymouth
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Random loss of power
V50 2.0D
I have had a few issues lately. A couple of weeks ago I lost tutbo boost and found one of the vacuum lines had a split. New bit of pipe and has been working fine since. Yesterday loss of power again so checked with a vacuum guage and all is well with a vacuum up to the TCV and also to the turbo. Took it out for a drive last night and all appeared well. Had wondered about DPF, so I did take it for a run just to make sure, but there were no DPF related fault codes even when the fault was still there. Set off this morning to drive from Plymouth to the midlands at 0430 !! No boost again, drove for 20 miles, switched off the engine and restarted. All back to normal, full power( I was starting to think of fuel filter but this proved it was OK). All fine for 2 hours. Stopped at the services and when I restarted loss of power again and cruise control switched itself off as well. Stopped a couple more times and restarted but the lack of power remained although the cruise control was back and working. Carried on and finished the journey. Car will still do 70 but lacks power for overtaking and hills. Seems normal below 2000 rpm, 2k to 3K lack of power and max revs about 3K. Still had 60 mpg for the journey Once up here I drove into town and all was working again. Parked up and set off again and a loss of power, so very intermittent. Plugged in and checked for codes this evening and brought up "CEM check fuses" No other checks I could find. Will have a look tomorrow but I seems like in intermittent circuit. I will check all the fuses and also all the connectors on the CEM tomorrow.. However if anyone has any further thoughts, advice or pointers on areas to check I would be very grateful. Screenshot attached. Thanks
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V50 2005. 2.0D Last edited by IainG; Oct 27th, 2021 at 20:04. |
Oct 28th, 2021, 13:01 | #2 |
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thats relating to the CCM rather than "CEM"
climate module, in red,however does look suspiciously like a loss of communication from/to CEM to CCM ,fuse or connector on the cem ,or at the ccm unit the air Quality sensor is the one behind the trim panel behind the waterfall, quite common for it to be "just dust" filling the senor housing, odd cases its the sensor itself (IIRC somehwhere on here someone found it is a easy/cheap part you could get from farnell/CPS and replace your self at a tiny cost) the unrelated CSC's do look like your cars issues, and sadly thats where im Zero help, its a diesel, and i have no experience with those
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940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "." |
Oct 28th, 2021, 14:18 | #3 |
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Hi
The red is the CCM however I touched on the CEM and the faults relate to that I have reposted the picture to show" The red warning for the CCM has been there for a while but has not caused any issues up to now. Wasn't too sure how hard it was to access!! Might have a look once I have fixed the running issues. This morning 2 trips all fine but the 3rd start the fault is back!!! I have ordered some Electrical contact cleaner, pick it up tomorrow so will have go tomorrow. Might unplug the CEM bring it in the house for a check then refit and use contact cleaner on all the multiplugs as they go back. Iain
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V50 2005. 2.0D Last edited by IainG; Oct 28th, 2021 at 14:49. |
Oct 28th, 2021, 21:57 | #4 | |
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Quote:
do diesel have a fuel pressure sensor ? tho i would expect a Fuel pressure sensor error code if they do and its that, thinking is those symptoms on a petrol, id be looking at the fuel pressure sensor first, then lift/fuel pump/filter and finally the pressure @ the rail
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940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "." |
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Oct 28th, 2021, 23:03 | #5 | |
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Hi
Quote:
Iain
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V50 2005. 2.0D |
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Oct 29th, 2021, 22:48 | #6 |
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Hi
Picked up some electrical contact cleaner today. Removed the CEM, checked then removed all fuses from it. I then opened the unit to see if there was any damage or any ingress of water. It looked like new. I cleaned all the blades on the fuses and checked all the multiplugs pins. Removed and cleaned the contacts on the 2 external relays. Sprayed the contact cleaner on all the pins and plug contacts. Reassembled and refitted to the car. It started. Big relief. Will clear the codes tomorrow and then see if there is any improvement.
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V50 2005. 2.0D |
Jul 8th, 2022, 18:34 | #7 |
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ccm 0040 code is showing on most of the volvos i read. the fix is expensive so no one repairs it . it will not affect the performance of your car. well done on finding faulty dpf sensor hose replace it with one with a heat proof sleeve as re gen temp is abt 600 deg
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