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Check Engine Light After Replacing Everything (P0420, P0430)?

Tiny
DAILYDRIVERDAD
  • MEMBER
  • 2014 FORD EDGE
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 168,000 MILES
I had a check engine light show (P0420, P0430) and had both my catalytic converters replaced. About a week after I had a blinking engine light (misfire cylinder 3 I think) and had all coils, spark plugs, and wires change. Two months after I got another misfire and the coil that caused it was replaced under warranty. Now my check engine light is on again (P0420, P0430) and I'm running out of things to replace! Would you recommend replacing the 02 sensors? I can do this myself and try to save some cash after all these expensive repairs. Thx!
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Wednesday, August 3rd, 2022 AT 10:34 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
When they replaced the catalytic converters were they new from the dealer or rebuilt? If they were not new tis should be the problem, you can try to replace the oxygen sensors, but we have had little luck with that being the problem. Here is the location of the secondary or monitor sensors in the diagrams below. Check out the diagrams (below). Please let us know what happens.
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Wednesday, August 3rd, 2022 AT 5:00 PM

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