Start with BMW 535i 2010 issue that Engine Malfunction Light on, then followed with solution and BMW diagnostic tools to use.
I was driving on the interstate at about 70 mph yesterday and the Engine Malfunction Light/Reduced Power came on. The car was running smoothly (no vibrations or misfires), but was definitely under-powered once the light came on. I turned off the engine and restarted it and after driving a bit, it came back on.
Here is some background on the car leading up to the light coming on.
2010 535i with 39K miles on it (bought it a year ago…it was someone’s 2nd car that didn’t get much use)
I had an ignition coil go out last week on cylinder 2 which was replaced.
I filled the car up yesterday morning right before the light came on
After the light came on, I pulled OBD codes and nothing came up.
After reading some posts last night, I heard some people have had the light come on because their fuel cap wasn’t secure. This morning, I tightened the fuel cap and drove it to work with no issue and no light. On the way home this evening it came on again. It appears to be triggering every time the rpms get above 3000.
Any thoughts on what is causing this to happen?
Is there a way to pull DME codes without a scan tool?
Actually, the way to pull the fault codes is to need a BMW-specific code reader. Get a Foxwell NT510 BMW scanner or find the Carly app and adapter.
The Carly setup allows to pull BMW specific codes and cheap price, but considering it needs to setup the BMW diagnostic software on smart phone, meanwhile Foxwell NT510 has some more
maintenance functions that I will need in the future, I get one Foxwell NT510 BMW scanner from foxwelltool.com.
The fault codes read out by Foxwell NT510 BMW scanner:
2B2C- fuel high pressure , plausibility; cold start
2c73- oxygen sensor after catalytic converter
2C78-oxygen sensor after catalytic converter
As it hints, there was a fuel pressure sensor low side error code. after running test plan for fuel system, found problem with fuel pressure high sensor, defective for low side causing fault on high side. No faults found with O2 sensors.
after running test plan for fuel system, found problem with fuel pressure high sensor, defective for low side causing fault on high side. No faults found with O2 sensors on amazon.
After the problem is solved, I spent some more time to learn Foxwell NT510 BMW test report:
And here Foxwell NT510 VS Carly APP:
Foxwell NT510 has a lot more functionality in terms of reading live data, freeze frame data, activating individual components to check for faults etc. If you had a tricky fault i’d say you have a much better chance of pinpointing it with the Foxwell tool.
It also has a lot more functionality i terms of DIYs since it can do resets/adaptations
The interface and connection is also a lot better than Carly.
And someone likes the fact that Carly can do simple coding but in general.