tdott wroteSecondary air system flow was only shown at first time misfire showed up. It hasn't shown up in my codes.Are these codes still present?
2B57 Air-mass sensor plausibility
2796 Throttle actuator test, , lower stop
27B1 Secondary air system flow rate bank 2
2729 Oxygen sensor coast mode diagnosis before cat bank 2
aggieshan wroteUser in that thread determined no compression in one of the cylinders which you indicated was not an issue with yours. Here's another post suggesting ICV: https://www.m3post.com/forums/showpost.php?p=26856319&postcount=21Actually, no, I haven't looked into this idle control valve. From the link you posted, it actually points to bent valve or broken spring. Should i look into adel control valve?
chenium wroteI looked up a few ICV related posts. It seems that it is logical step to look into ICV related components. There are two pressure sensor related to ICV and each bank. I am going to swap them and see if it makes difference first.User in that thread determined no compression in one of the cylinders which you indicated was not an issue with yours. Here's another post suggesting ICV: https://www.m3post.com/forums/showpost.php?p=26856319&postcount=21
I've also see other suggest to replace both plugs and coils at the same time.
spammysammich wroteGood point. I have been using trickle charger on and off on my M3 to keep the battery in charge. I didn't measure the voltage directly but I would assume the voltage is high enough. The battery is less than 2 years old BMW brand. The battery was registered.What is your battery voltage?
spammysammich wroteSorry. There was a typo. I didn't measure it.So what were the measurements? Also, was the battery properly registered?
aggieshan wroteHave you made any tune related changes recently? I'm thinking tune related or faulty TA.Secondary air system flow was only shown at first time misfire showed up. It hasn't shown up in my codes.
I am still getting Air mass, Throttle actuator test, and Oxygen sensor (instead of oxygen, it starts showing as lambda sensor).
tdott wroteInteresting to know. Well, the car had Alpine stage 1 from previous owner for 3-4 months in 2020. Since I bought the car in Jan 2021, I flashed the ECU back to stock using the file from previous owner. So the car hadn't have tune for 1 year.Have you made any tune related changes recently? I'm thinking tune related or faulty TA.
The description for 2B57 is not correct for S65 DME.
Fault description
Safety Concept Torque Limitation Level 1
Condition for fault identification
Action in service
This fault memory entry is always a collateral error. The only way to rectify it is by resolving the malfunctions behind any other displayed fault memory entries.
Fault effect and breakdown warning
. Engine speed limited
. Reduced power
https://www.m3post.com/forums/showpost.php?p=15175643&postcount=4
aggieshan wroteThe link provided is the source of the correct description for MSS60. It's a more accurate description as the same code on other models could be something else.How do you know this code is not related to S65? Is there a way to look it up?
abdulbata wroteHaven't been able to work on my car. I will report back to you on this later. Hopefully in one or two weeks.I'm having a similar issue on my 2011. Did it end up being your ICV?
adrian.spadaro@gmail.com wroteThat was the first thing i replaced, but it doesn't help in my case.I had a similar issue and was resolved by replacing both exhaust seal rings. Part number...11627830668
aggieshan wroteVery similar sudden misfiring issue lead to limp mode.Dear M3post, My M3 is having band 2 misfire issue. It happened suddenly one day at a traffic stop. The idling sounds rough and fluctuate a bit. After driving for a few more miles, the engine power reduce msg showed up on the screen. I was able to drive it back home. The car seems to be still drivable. (I don't drive it just in case). The car is e92 M3 at 53k miles no mode but m performance exhaust. I have searched our forum extensively. It seems that there is no definitive answer to this. I don't know where to start to debug the issue. I have replaced exhaust x pipe gaskets based on forum suggestion. What should I do next?
I have a basic scan tool. Here are a few codes:
2B41 Misfire with cutout several cylinders (spark plugs replaced 5K ago, ignition coils are original)
2B57 Air-mass sensor plausibility
2796 Throttle actuator test, lower stop (TAs have been replaced 5K miles ago)
27B1 Secondary air system flow rate bank2
2729 Oxygen sensor coast mode diagnosis before cat bank 2 (Both pre cat oxygen sensors were replaced (bosch version) about 3K miles ago)
2B39 Misfire with cutoff cyl. 5 6 7 8
2B4E Misfire impairing exhaust emission at several cylinders (I replaced the exhaust X pipe O ring gasket based on misfire forum search)
Running data:
Fuel injection timing cylinder 1-4: 3ms (at idle) or higher (when apply gas)
Fuel injection timing cylinder 5-8: 0ms (at idle) stays at 0 (when apply gas)
smokinjoe64 wroteThanks for the info. So far, I have exhausted all my speculated repairs and tests. Since my last post, I have replaced MAP sensor (Part:13627838385) and it doesn't help. The misfires still happen and usually show at bank 2. Before replacing the MAP sensor, at one point, it shows only cylinder 8 misfire. Now, after MAP sensor, it shifts to cylinder 5. I don't believe it is cylinder # dependent. It has to be bank 2 related.Very similar sudden misfiring issue lead to limp mode.
Bottom line - Primary cat clogged. Replaced OE mid-pipe with catless Bomiz x-pipe. Problem solved.
Below is a list of repairs & PMs completed only to have major misfires [diagnostic]. Cruel failure after a good bit of time & money.
abdulbata wroteI replaced MAP sensor and it doesn't help. It doesn't seem to be ICV related. The idle speed is more or less stable. The engine holds its speed about 3-5 secs after start and will go into Limp mode after that (along with bank 2 misfire). During he first 3-5 secs, the engine seems to run normal without misfire. (ignition timings seem to be even among all 8 cylinders )I'm having a similar issue on my 2011. Did it end up being your ICV?
Redd wroteIf you have an OBD2 dongle, use Torque app (paid) and log air-fuel ratio in real time. See if there are spikes in afr just before the misfires start. It might be some sort of air leak pre-O2 sensor in the bank 2 exhaust.
Redd wroteHi Redd, The problem is I have replaced Bank 2 pre cat o2 sensor just to debug this misfire. It doesn't seem to help. Could there be other exhaust leak?If you have an OBD2 dongle, use Torque app (paid) and log air-fuel ratio in real time. See if there are spikes in afr just before the misfires start. It might be some sort of air leak pre-O2 sensor in the bank 2 exhaust.
spammysammich wroteI’m curious why do you ask about the battery ? I have similar code and battery was not properly registered prior - what’s the relation ?So what were the measurements? Also, was the battery properly registered?
