Catalytic converter problem ?
Thread Starter
Senior Member
Joined: Jan 2016
Posts: 195
Likes: 37
From: Fort Worth ,Texas
Catalytic converter problem ?
Anyone having converter problems ? Last Sept. a year ago I had a check engine light come on and took it to dealership . They pulled up P0420 Bank 1 catalytic converter restriction and failure . They replaced it under warranty (30,620 miles) and had no problems until now . About three weeks ago check engine light comes on and before I can take it to get it checked out light goes out (about 3 days) . Go another 4-5 days and check engine light comes back on . I take it to Autozone to pull code and it comes up P0430 Bank 2 Catalyst System efficiency below threshold . This was on a Friday and by Monday morning light went away . So drive a few more days and light came back on . After 2-3 more days light is back off , I'm at 46,500 on the truck . Anybody else having this trouble on your 3.5 Ecoboost engines? I'm going to take it in this week to see what up with it.
Senior Member
Joined: Jul 2014
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Had that code three times and three catalytic converters later they found it was because rodent damage. It happened around this time of year too. Might be worth a check under your hood to see if you see any footprint marks or insulation being chewed. I doubt it's rodents, but you never know they are everywhere.
Thread Starter
Senior Member
Joined: Jan 2016
Posts: 195
Likes: 37
From: Fort Worth ,Texas
Had that code three times and three catalytic converters later they found it was because rodent damage. It happened around this time of year too. Might be worth a check under your hood to see if you see any footprint marks or insulation being chewed. I doubt it's rodents, but you never know they are everywhere.
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Thread Starter
Senior Member
Joined: Jan 2016
Posts: 195
Likes: 37
From: Fort Worth ,Texas
If they replace mine it will be the second one . Seems odd they would fail so soon. I’ve had other vehicles including other Ford trucks and have never had this problem. Only thing close was a 2000 Tundra and frequent O2 sensor replacement.
