Cleared my Check Engine Light...

[starship1701a]

2 codes came up on my ML320,

P0301 Cylinder 1 misfire detected
P0400 exhaust gas re-circulation flow

need a little help please... so if im going on the highway up a hill and then stomp on it, under load the car would start misfiring... later after restarting the car its all good.

#1 cylinder is passenger side front?

should i change up my coil pack for #1? spark plug?

should i change out the EGR ?

 

[Botus]

you could clear the P0301 code... swap the coil pack to a different cyl start it up and see if the code moves... if it does it'll be the coil pack

could the other be the cat objecting to the misfire ? or a self destructing cat blocking the flow.... leading to a misfire

not sure if this is correct

https://www.autozone.com/repairguid...ing-Orders/Firing-Orders/_/P-0996b43f80384297

 

[LostKiwi]

not sure if this is correct

It's contradictory....
No1 drivers side front of car. The front cylinder other bank is no 4.
Swap coilpack 1 with 4 and see if the fault follows the coilpack.
It's rare an EGR causes issues on a petrol engine.

 

[starship1701a]

It's contradictory....
No1 drivers side front of car. The front cylinder other bank is no 4.
Swap coilpack 1 with 4 and see if the fault follows the coilpack.
It's rare an EGR causes issues on a petrol engine.

 

[LostKiwi]

View attachment 48332

Incorrect.
It's an M112 engine. Right side (drivers side for UK cars) is 1-2-3 passenger side is 4-5-6 with 1 and 4 at the front of the vehicle.

 

[starship1701a]

Incorrect.
It's an M112 engine. Right side (drivers side for UK cars) is 1-2-3 passenger side is 4-5-6 with 1 and 4 at the front of the vehicle.

alrighty then.. i stand corrected...

thank you.