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O2 sensors have never been replaced, engine light is on. Mechanic has not been able to find out why the engine light is on. Runs fine, but rich on the fuel burn.
I have 208,500 miles, I am also having issues with fuel in the oil. I replaced the valve gasket and
coil pal gaskets, not that this has anything to do with fuel, but needed to be done. Runs fine no misfires, o Riley checked codes and they are as follows. P0002 high pressure fuel pump,
fuel pump cover, fuel pressure regulator,
injection actuation pressure control valve, cold starting fuel pump, fuel pumps and senders.
any thoughts?
thank you in advance for any help
My advice is get your own Mercedes specific obd scan tool. One of the Launch brands is good.
Then you can scan and read all the fault codes. You will be able to see live data such as high and low fuel pressure. It would be very helpful to see what your fuel pressures are to diagnose this. Just listing "cold starting fuel pump" doesnt really tell us much. Last thing you want to do it start replacing parts that arent the problem.
When you receive the scanner turn it on and look for the latest software update and download it if needed.
Scan the car for all fault codes. I like to take photos of the screen with my phone, photos automatically upload to my pc so they are easier to look thru.
Erase all the fault codes when done. Go for a drive and see which fault codes come back. May take two or more driving cycles to trigger a fault code. Keep an eye on the check engine light if it comes back on, take notes of when it comes on. Does it come on when starting the car, when pulling out the driveway, at a certain speed or engine rpm?
If the check engine light starts blinking its best to not drive the car.
The Elite 2.0 version has a bunch of benefits over the original version — internal battery, faster processor, screen shots, stored reports, etc. Not sure if the original version also does screen shots, etc. For the price, the 2.0 is a better deal in my opinion.
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