2018 Ford Edge Titanium 2.0L Error Code P0302

[billw6560]

I have a 2018 Ford Edge Titanium 2.0L with Error Code P0302. Ok, I know that this error seems common, but my symptoms are not quite what others note. I should also note that the I don't see any degradation in fuel economy, engine performance seems normal, or any other issues so far. The car has just under 87,000 miles. It was bought as a Certified Pre-Owned car with its 100,000 mile, 6 year warranty. Unfortunately, the "In-Service" date expired in August this year. Go figure.

 

1) Besides the check engine light with OBD-II P0302, the first sign of a problem is that the engine starts rough when cold started, but clears up after about a minute or two. After that, the engine seems to re-start and runs smooth.

2) Taking the easiest route, I changes all 4 plugs with Motorcraft plugs. No change.

3) I then changed the coil pack, and still no change.

 

So the $64,000 question is, would I be wasting my time with trying a Sea Foam treatment? If that doesn't do it, from what I've read, it could be a fuel injector, blown head gasket, or cracked cylinder. As I mentioned, other than an initial rough start, the engine it seems to run smoothly. My first guess that it could be the fuel injector. The later two "fixes" would only be considered it the engine runs rough continuously, which it doesn't.

 

Any suggestions would be gratefully appreciated.

 

Thanks,

Bill

[dabangsta]

One possible issue it might be is the so called "coolant intrusion" issue. You don't mention your coolant level going down or needing to add some or frequently, but it is possible that is the issue, or seeing white "smoke" (actually steam) from the tailpipes. The spark plug from that cylinder would have looked different, probably lacking carbon or maybe orange/yellow tinged from the coolant.

 

https://static.nhtsa.gov/odi/tsbs/2019/MC-10169807-0001.pdf

[billw6560]

All the plugs looked the same. No major flaws other than normal wear for their age. However, I do remember having to top off the coolant a few weeks ago. Don't know if this is related to what you're saying, but here in Florida, our summers are really hot, and the Edge is driven on the highway 3-4 times a week over 50 miles R/T.

 

I'll look at the exhaust to see if there's tell tale signs of steam.

 

I looked over the TSB (thanks), so I suppose that the next step is to have my local shop look at it, and if exhaust steam is present, have them do a coolant pressure test.

 

Thanks!

[1004ron]

19 minutes ago, billw6560 said:

However, I do remember having to top off the coolant a few weeks ago. Don't know if this is related to what you're saying, but here in Florida, our summers are really hot, and the Edge is driven on the highway 3-4 times a week over 50 miles R/T.

 

High ambient temperature doesn't result in coolant evaporation.

 

"engine starts rough when cold started, but clears up after about a minute or two"

 

The loss of coolant and the rough running on cold starts points to coolant intrusion.

 

There's a number of tests that can be done to confirm the coolant intrusion - try a forum search.

[1004ron]