Misfire codes

L

Lsinclair61

Member
A couple of weeks ago the Service Engine Soon light came on out of nowhere. It coded that cylinders 1,3,5 ignition coils misfires. So I chose to replace all coils and plugs. Despite that the Service Engine Soon light continued to remain lit for a couple of days despite not giving any further codes. Then this morning when I started the car Service Engine Soon light came back on.

This afternoon Martin check for codes for me and at first it said “ignition coils misfire 1, 2, 4 & 5” Martin went outside and checked to make sure all were locked into place and they were. When we went back in to print code results the results changed to “Randon Misfire Detected” and listed Secondary DTC’s as seen on attached photo.

Anyone have any suggestions? We do not have a BMW dealer for more than 155 miles and the one known shop that works on BMWs is less than reputable takes your car for days before getting to it.
 

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Hi,

From the experience I have had with my car, I would check the air intake, item number 13547514867 on eBay. These degrade over time, little splits on the small hose for example and if yours is the original with that amount of miles, it may have perished.

I changed mine which is a straightforward job, the codes were then cleared and they never came back! I would also suggest you invest in your own code reader, I have found my to be really useful and will have saved a lot of money not having to go to the garage for diagnostic checks.

Good luck and let us know how you get on!

Paul
 
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