Start jumping then check engine, oil and wrench light?

Tiny
ACHASTAIN027
  • MEMBER
  • 2010 FORD FUSION
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 270,000 MILES
2010 Ford Fusion SEL 4 Cylinder

2 weeks ago car started being weird past 40mph. It would start jumping then check engine, oil and wrench light would all come on followed by a stall. I'd turn it off and on and the lights would go away and repeat. I replaced the crankshaft position sensor and all the problems went away for a week. I had no problem going 70+ mph on the interstate. Now for the past week it's been very inconsistent. Though instead of the oil light coming on it was just the check engine and wrench light. 40+ mph jumping, followed by wrench light coming on, probably no stall. Went to AutoZone and had the battery, alternator and starter tested. Battery was bad (replaced) but alternator and starter were good. Now the more and more I try and drive it it's a lot more consistent in the jumping, stalling and lights (now oil, wrench and battery lights). I tried resetting the ECM a few days ago. I tried resetting the PCM today. Same problems
Sunday, August 10th, 2025 AT 12:46 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
This sounds like fuel pump, or PCM is going bad but we need to run the codes in the computer to see which codes are stored which can give us the clue to what is wrong. This guide can help or you can go to autozone to have them scan it for you.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, I would remove the electrical connectors from the PCM (disconnect battery) to check for corrosion on the pins. Here is the location, (passenger side of the firewall) so you can check it out.

NOTE: PCM replacement DOES NOT require new keys or programming of keys.

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Monday, August 11th, 2025 AT 9:50 AM

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