[2011_335d_problems]

I have a 2011 335d with approximately 89,000 miles on it. The vehicle is limp. Acceleration is incredibly slow. ABS and Brake warning indicators are on. I've read a few of the forums and I do not think they directly address what I am looking at.

I ran a scan and it came back with the following codes:

DSC [DSC_87] | 5DF0: Hydraulic unit: pump motor
DME/DDE [D73N57C0] | 4595: 4595 Operational smoothness regulator, cylinder 6
DME/DDE [D73N57C0] | 4CE6: Misfire detection, cylinder 6
DME/DDE [D73N57C0] | 4B82: Exhaust-gas recirculation-rate control, control deviation
DME/DDE [D73N57C0] | 4862: air system, air to EGR mass flow, plausibility
DME/DDE [D73N57C0] | 4865: air system, air to EGR mass flow, plausibility
DME/DDE [D73N57C0] | 4530: Charging pressure control, high-pressure stage, control deviation: Charging pressure too low/positive control deviation

FZD [FZD_87] | A670: No description found

Any help is appreciated.

Edit:

There is not much in the way of maintenance because I purchased it at 50k miles and have not had any issues since the purchase. I've taken it in for regular maintenance until this issue because the quoted costs are high and the mechanics I have taken it too have not been able to identify a specific issue.

[Yozh]

Nice screen name. Looks like the car is stock. And you may have several issues. The DSC one is a separate one. Then your EGR and 4530 and misfires May be all related. Fix 4530 first then look at others. Unfortunately 4530 is a broad code that could point to boost leaks, exhaust restrictions and turbo control system issues. Has car had any recent work done on it. What is it’s history, maintenance, other issues.

[Owen81]

There are a lot of posts with EGR, smoothness and boost codes. Do some reading and put in some time diagnosing your issues.

No one is going to be able to swing a magic wand and know exactly what is wrong with your car, especially when you don't post any history/maintenance details.

EGR/smoothness codes are generally related to CBU (carbon build up) but could be injector issues as well

Boost codes are most often vacuum related issues, could be piping, seals or turbo related as well.

DSC/ABS codes will be a separate issue as Yozh has stated, IIRC these are usually a wheel speed sensor going bad but it could be something else.

[Tambohamilton]

5DF0 - ABS motor probably needs new brushes. Can be DIYed. Worry about it later.

4B82 - EGR is probably clogged, but may just be jammed. Fairly easy to disassemble and check.
4862, 4865 will be triggered when EGR stops working. Fix the EGR and you will fix these.

4595, 4CE6, 4530 probably all point to excessive CBU. But there could be other culprits. The state of the EGR valve will be an indicator of whether CBU is likely to be the issue.

A670 - windscreen fogging sensor is broken. This is unrelated to your running issues - only affects automatic windscreen demisting. Replacements are not cheap, but are very fragile!


So, I'd start by investigating the EGR issue. This may well be an easy fix, and should give you a decent insight into your other running issues. ISTA D has a test routine for actuating the EGR valve. If your engine is an N57 (not M57), then there should also be a test routine for CBU.

[2011_335d_problems]

Thank you for the response. I appreciate the comment.

There is not much in the way of maintenance or history because I purchased it at 50k miles and have not had any issues since the purchase. I've taken it in for regular maintenance until this issue because the quoted costs are high and the mechanics I have taken it too have not been able to identify a specific issue.

[RED-d]

First step is to remove and inspect the EGR for carbon build up. Easy DIY.