Codes P0201 and P0301 are being read immediately after local instant oil change garage overfilled engine with oil

Tiny
OBBOLDEN
  • MEMBER
  • 2010 CHRYSLER TOWN AND COUNTRY
  • 4.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
After driving less than a quarter of a mile from the oil change garage black smoke began to come from the car as the car began to shake violently. Pulled to the side of the road and the garage mechanic drove out and confessed to overfilling the engine with oil. They drained all the oil out then put the "proper" amount back. The next day the engine light began to blink as the car again shook violently until it cut off on its own. This happened for the next three days. The area manager for the oil change garage stated that the codes were purely an electronic issue and what I was experiencing had nothing to do with them overfilling it with oil. He also said there was no way oil could cause the fuel injector to malfunction. Since they refused to take responsibility, I took off the upper manifold intake and inspected the fuel injectors and spark plugs. Oil was found in both female and male ends electric connector to the fuel injector that corresponded to the codes. I took pictures and sent to the manager. He still claims no fault. Said my issue is coincidental to their overfilling with oil. Could their error be the cause?
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Thursday, February 16th, 2017 AT 5:33 AM

6 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
As far as the injector and other connector which I suspect is O2 sensor I doubt that the overfill of oil caused that. The injector looks more like grease that someone may have used for a better connection like dielectric grease. 301 is misfire on #1 which can be caused by a bunch of stuff like a bad injector, sensor, low fuel pressure or a ton of other things. Also, you do not know how overfull the oil was to begin with especially if it got to plug it would probably hydraulic the motor and that does stuff like bend rods when that happens. The manager may be right in this case but you should contact the company nationally and see if they will do anything on a goodwill gesture and have a mechanic diagnose what is causing the misfire as well. If in the case it is engine damage you will have a good case to stand on because it has been professionally diagnosed what the problem is due to whatever.
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Thursday, February 16th, 2017 AT 6:29 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Picture shows possible causes for code 201 which is fuel injector circuit. Which again should be diagnosed by a pro see picture. It is probably the reason for the misfire code on cylinder one.
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Thursday, February 16th, 2017 AT 6:33 AM
Tiny
OBBOLDEN
  • MEMBER
  • 3 POSTS
Thank you so much for your response. The manager sent me to their "full service" garage to diagnose the codes. Once he got to the part where the computer told him to take off the upper intake manifold he stopped and asked for a $300.00 payment to continue with the diagnostic. The next day I replaced the "faulty" fuel injector and the spark plugs. The car is running smoothly now and has been for about a week. My fear is that there may be potential engine damage that may be a result of their overfilling of oil. Is it too late to take to a professional shop that does not have any skin in the game to see what the problem was and what was the cause?
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Thursday, February 16th, 2017 AT 8:50 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Well it is always better to do it from the start, but you can take the old injector and plug with you If you still have it so he can look at injector. Especially If it runs fine I doubt there is any hidden damage, but if he says something about the injector have him write it down and contact the oil change company and complain they may rebate your money that you have spent for injector etc.
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Thursday, February 16th, 2017 AT 9:25 AM
Tiny
OBBOLDEN
  • MEMBER
  • 3 POSTS
Thank you again! I was going to try and get them to pay for the parts and my time fixing it. But if you think parts alone is sufficient I will stay with that.
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Thursday, February 16th, 2017 AT 6:10 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,648 POSTS
Please let us know what you find so it will help others.

Best, Ken
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Sunday, February 19th, 2017 AT 3:04 PM

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