Baby BMW Forum banner
1 - 11 of 11 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter · #1 ·
Hello all,

So I bought a 116d that I knew was "running slow" as a runabout for myself. By running slow, the owner meant "it only does 15mph so your 10 mile journey home is going to take an hour".

Anyway, I doubt the turbo or actuator is knackered as the zero to 15 is pretty quick. First thing I noticed was the engine temp light came on as soon as I'd left sellers driveway. Checked coolant before and it was fine. Definitely not overheating, and as you can see from the Bimmerlink data (stone cold engine when I checked) the temp sensor thinks 128c always.

Other things I noticed was -40c exhaust temp before DPC, lambda data off, and an error code for oil level.

What do you think I should change/order first?

Actuator moves by the way, but only when ignition is turned on, or off. I couldn't move it by hand...is that normal?

Thanks in advance
Font Multimedia Screenshot Software Rectangle

Font Screenshot Rectangle Software Multimedia
 

·
Administrator
Joined
·
4,029 Posts
Not clued up on diesels but if your DPF is clogged as the last code reports then that would probably explain the car’s performance anxiety? If the code is current I wouldn’t throw too much money at the other stuff only to find it was uneconomical to sort the DPF issue.
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #3 ·
I've been away from the UK for 16 years...if I remove it is it an MOT fail? Seen DPF straight through pipes on eBay for cheap...Sensors arriving today anyway so that's the first thing I'll try
 

·
Administrator
Joined
·
4,029 Posts
MOT fail, insurance invalid, £1000 fine if you’re caught, all that good stuff!


From what I understand, when there are errors stored the car refuses to let the DPF regenerate even if you try to force it with software, so the “DPF is knackered” code ends up being a self-fulfilling prophecy. You can have them removed and chemically cleaned, will be a lot cheaper than replacement!

Definitely worth waiting for others’ opinions or speaking to a pro, I’m just parroting what I picked up helping a mate with a similar issue 👍
 

·
Registered
Joined
·
54 Posts
Ok mate thanks.

1000 fine and insurance invalid doesn't sound fun! According to my diagnostic software the last "regeneration" was 2,000 miles ago.

Hoping it's all sensor related
 

·
Registered
Joined
·
54 Posts
It would be worth getting hold of ISTA+ to provide a more complete diagnosis. Or at least use the software you have to trigger a regeneration (although as others have said, a regen may not take place if other factors are preventing it). ISTA+ will not only identify the fault codes but provide a step by step troubleshooting guide to resolving the issues.

To me it sounds like the lambda/oxygen sensor is the cause of your woes. I have linked to a couple of forum posts that may help:


 

·
Registered
Joined
·
6 Posts
Discussion Starter · #8 ·
Requested a regeneration, but yeah it won't do it with the other faults. Temp sensor should arrive tomorrow, so I'll fit that, then give it another scan. Last regeneration was 2,500 miles ago btw...
 

·
Registered
Joined
·
3,229 Posts
I'm pretty sure it wont do a regen while it thinks the car isnt up to temp.

PS. Yes, found an extract from ISTA. Engine temp must be over 75% and exhaust gas temp before DPF over 240c
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #10 ·
As I had hoped, the new coolant temperature sensor fixed the car. I'm still not getting a data stream from the "before dpr exhaust temperature" and still have the oil level and oil temp sensor issue, but the car was running fine after changing the coolant temperature sensor. I got 67mpg at 50mph in 6th, so not particularly worried about any fuelling issues. So yeah, basically a £12 sensor from Amazon turned a £900 "spares or repair" car into a £2000 fully working car 😎💪👍
 

·
Administrator
Joined
·
4,029 Posts
Result!!

See if you can clear errors and force a regen now - if it lets you, dump in a bottle of cleaner and go for a 30min blast down the motorway. You don’t want to kick that particular can down the road for too long 👍
 
1 - 11 of 11 Posts
Top