rockdizzle

Just went and got car scanned said p2540 low pressure fuel sytem sensor/ circuit range/ performance. They thought was gas cap and it is not havent got car filled. Car sat for 2 months came on first time i drove it. Please help

Merc63

Check your fuel pressure.

I have fuel pumps if you need. They are under rear seat.

NS_C63

https://mbworld.org/forums/c63-amg-w...anges-c63.html

Dealership changed my fuel pump last year and error gone. No issues since then. Dont waste your time on sensors / regulators, etc. It is the fuel pump.

rockdizzle

Thanks for the info im going to take it to the dealer next week, can i still drive the car there?

NS_C63

Yes you can, fuel pump goes into "safe mode" and pumps constant higher fuel pressure. I drove and raced my car for over a year before getting the pump changed. Worst case is your car runs too rich.

C-63AMG

Guy's what a CEL code?

SaphGreyC63

Check Engine Light code

C-63AMG

Ahhh - thanks

jvanbrecht

I just got this code again, for the second time (they replaced the pumps previously).. uggg time to go back to the dealer.

naderkourani

Hi
I have a 2009 E63 with a fault code P2540 that comes and goes , the car has 2 fuel pumps under the seat, how do I know which one needs to be changed, or which one to order online , websites says primary fuel pump and secondary fuel pump.
also does this affects the 0 to 60 performance, because the best that could get was 5.2 sec

Thanks a lot for your help.