Codes P0701, P0202 and P0302, car is shaking and engine light is on?

MC268726

MEMBER
2010 LINCOLN MKZ
3.5L
6 CYL
2WD
AUTOMATIC
166,500 MILES

Car is shaking and engine light is on. I ran diagnostics and it gave errors p0701, p0202 and p0302. Saying O2 sensor issue and cylinder 2 misfire. So, I replaced all 6 spark plugs, ignition coils 1, 2 and 3, and the O2 sensor and still shaking with engine light on. The poured fuel injection fluid into gas tank and it ran perfectly last night, engine light was still on but there was no shaking. Then this morning shaking started up again.

Wednesday, September 13th, 2023 AT 6:31 AM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
50,041 POSTS

The first code, p0701, will not have anything to do with the engine problem so please start a new thread for that.

P0202 - Cylinder 2 Injector Circuit/Open: This code indicates a problem with the fuel injector circuit in cylinder 2.

P0302 - Cylinder 2 Misfire Detected: This code indicates a misfire in cylinder 2. Misfires

So, this is telling us the fuel injector on cylinder # 2 needs to be replaced but I would check the electrical connector to make sure it is not damaged or corroded. Here is how to change the injector out. You will need to remove the upper intake which I have included. The number 2 cylinder is the middle cylinder closest to the front of the car. Check out the images (below). Please let us know if you need anything else to get the problem fixed.

Images (Click to make bigger)