Check Engine Light Help

[theplayer]

I had my car in the body shop for repair and when I go to pick it up it is running rough and the check engine light is on. It looked like some gas had been put in it because I was on empty when I took it in and it had some in it when I went to pick it up. Plus it had 2 miles on it that was not there before. The code I got was 10 PCM P0300H. That is a engine misfire code. Could putting 87 unleaded cause this to happen? They worked on my bumper so they didn't touch the engine.

 

[c4c5specialist]

Sometimes, running a lower grade fuel may make this code set.
I would suggest filling with 91 or better octane and monitor the condition.
Please let us know how you make out, c4c5

 

[theplayer]

Does any error code cause the check engine light to come on? The P0300H code is a history code but the check engine light never came on until 2 days ago. And it ran fine until the light came on.

 

[theplayer]

Update, I took my car to the dealer and the hooked it up and found 5 error codes. They said they were all related to the P0300 code though. I only saw the P0300 code though. Anyway they checked each injector by itself and they worked fine, but when they did a "balance test" and checked them together the whole left bank wasn't working. I had spark to each cylinder so it something with the fuel injection. Could it be a computer problem?

 

[c4c5specialist]

Hm, the entire left bank not working, sounds like a fuse blew, INJ1 which would be located in the underhood electrical center.
Please keep us posted, because if these 4 injectors were not working, you would barely be able to drive the car.
c4c5

 

[theplayer]

Yes, I drove the car to the dealer and it would hardly go over 40. It had no power and it was shaking very bad. They checked the plugs and had to replace 1,3,5,and 7 plugs. They said all four were fouled. After they replaced them the car runs fine. So I guess the injectors were working but it wasn't sparking. I was getting info from 2nd party anyway about the injectors so who knows. It seems strange that 4 plugs would foul all on the left side. There had to be something cause them to foul. Any ideas?