Reduced Engine Performance message XC60
 

Hi,

I'm wondering if anyone can throw some light on a problem I'm having with my XC60 (2015). I had it in a dealership a couple of months ago to have the battery replaced (stop/go system not working) and this now works ok. Whilst in the dealership, they took it upon themselves to do a software update. Since having the software update I have a message which comes on "reduced engine performance" with a turtle next to it. This message never came on in the past and has only started since the update!

Since then, it is sluggish, lacking power and exceleration in the lower gears and seems to 'judder' until you put your foot down. For various reasons, I wasn't happy with the customer service received from the dealership so took it to a local Volvo independant garage. They've cleaned various things out and put a new manifold on which has helped a bit, but it still doesn't drive well (in my opinion), it should be smooth and responsive and it isn't. It also stalls as it needs plenty of gas when in first gear and moving away. The message "reduced engine performance" still comes on sometimes which can't be right? Has anyone had anything similar or can anyone give me any ideas what I should be doing?

Also, when the independant garage did the diagnostic check, it came up with the following message "CEM U030141 Software incompatibility with ECM/PCM - System internal failures - general checksum failure", does anyone know what that means???

I changed to the XC60 last November, I'd had a 2006 XC90 for 5-years and it was fabulous, never missed a beat and was a dream to drive, very costly on tax and fuel so decided to downsize to an XC60 and I'm now starting to feel somewhat disappointed. Any advice, greatly appreciated.

Seems the software update may have caused an issue probably needs to go to a reputable dealer to look into the software issues, what engine and spec is the xc60 reduced performance could be. One of many things but dpf springs to mind do you do lots of short trips? Was the car low mileage when you bought it ?

There were egr issues on some models there was a recall get VIN checked hat the EGR cooler recall has been done...

New manifold seems an odd replacement ???

I'd start by speaking to the dealer who did the update as a Checksum error normally means the SW is either a) incorrect or b) corrupted. Are you sure the Indie didn't attempt to update any SW before reading the codes ?

New manifold seems to be more of a try this approach rather than a known fix, the code indicates software issue rather than any component.

Did any sensors get swapped as part of the manifold change ?

This is the answer - a known problem that a Volvo dealer will fix FOC
https://www.volvoforums.org.uk/showthread.php?t=221555

Well, I had exactly the same issue as you. In the mid of May I approached the dealership (the authorized one) in order to fix the oil level gauge (prior to this I didn't knew in 2014 D4 VEA 181ps it will show only MAX, OK or MIN levels). I've been told there was a engine driver updated additionally. Since then I was facing issues with Reduced Engine Performance and Turtle. It was occuring when I was driving ~75 mph or faster. Since mid of May I was coming back to the dealership for further checks to know what is happening with my car. Each time they were telling me that they weren't able to reproduce the issue. Finally - it was 3rd or 4th time I approached them again and told to drive the car for more than 10-20 minutes with that speed. Then they confirmed that the issue occured and I left the car for around 3 days over there. It was not possible to deal with this issue by them locally and they got some tech support from Sweden. After this fix (applied last Monday) the issue has been resolved - the turtle icon didn't shown up again and I did already around 300 km (around 180 miles). Nevertheless, I still have this error UO30141 (and additionally P060C68).

https://www.volvoforums.org.uk/showt...58#post2536858

Any info on the fix applied?

That was a software fix but I don't have any details on it. I've just read your thread and for me the root cause of yours 'reduced engine performance' seems to be bit different. In my case this message popped-up after 10-15 miles.

I have not seen it since. As my car had only done 12.5k in 3 years all short trips, I suspect that having had a blast at motorway speed for the first time in its life may have a lot to do with it! There was probably a lot of gunge dislodged.

Same problem as above .Reduced engine performance.All garages gave me quote to do same job mean inlet manifold with fuel pipe £540 and another one £625 but only for inlet manifold.Decided for £540 and nothing helped.They read the codes and done repair.nothing helped.They pay attention to software issue and told me to get touch with main dealer.Already booked for 17th of may and will reply to you regarding what been done. Ps I had done as well at garage carbon clean for more than 1.15minutes but can’t see any different until performance back in place :-) regards my car is XC60 late December 2014 181BHP 126 on the clock

Check Engine, P04D9, Reduced Engine Performance, P00BC
 

Take a look at my problems, now resolved
https://www.volvoforums.org.uk/showp...&postcount=465