Fuel trim malfunction

[Cru328prod]

my CEL came on i got the code read and it said Fuel trim malfunction (bank 1) any ideas?

[Espresso]

Normally that is a bad O2 sensor. Easy way to find out is to swap the sensors & see if you get a bank 2 fuel trim problem.

But do not be suprised if your MAF is bad. It will throw a P0170 & a P0173(IIRC)
Fuel trim Bank1 P0170
Fuel Trim Bank 2 P0173

[Cru328prod]

gooooooood dammit i just bought a new MAF...............but its not OEM and i got a P0170 code, how many o2 sensors does the 23k have?

[Cru328prod]

Ha fixed it.........i guess the techs and merc was fucking with my A/F ratio wire......its all good now thanks

[Cru328prod]

GOD DAMMit IT CAME BACK ON!!!!!!!!!!!!!!!!!!!!!!!

How many O2 sensors on in the c230k?
and how do you test the MAF?

[VIP_MBZ]

Lol, lots of god damning in this thread.

[Cru328prod]

i think god dammed my car:bored: