[2011335d]

I'm a novice with diesel engine but just recently dash like came on with code p0304 only. The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring.

What is the most common cause of this code? As I can't check spark plug or ignition coil on a diesel. Car has about 63k miles and has only a stage 1 tune with all emission still on car. I do have a third party bumper to bumper extended warranty should i just take it in and let a shop or dealer deal with it?

[335stoner]

if your third party warranty covers it I would you paid to have the car covered....

look over the packet and make sure it covers injectors.. bumper to bumper coverage will still have exclusions.

[2011335d]

yea third party covers injectors. covers almost everything except for the normal wear items.

listed non covered mechanical items:
Exhaust system, catalytic converter, clutch assembly,
shock absorbers, brake rotors and drums, tires, fan
belts and filters; wheels, non-metallic hoses; brake pads
and shoes; battery, battery cables, spark plug wires;
distributor cap and rotor.

[335stoner]

awesome! what is the coverage company?

i would use it if you paid..... other wise money has been wasted

[2011335d]

Enterprise Financial Group, Inc (EFG) it was a 60 month/75k from current mileage warranty for $2070. mines cover until 9/2019 as I wont get to the 75k.

warranty is only thing stopping me from going 2.8with abc delete.