CEL trouble codes

Sark5.0
Sun, 10 Jun 2018 07:49:39 +0000
Maintenance/Repairs

2016 mustang GT with muffler delete, magnaflow true x resonator and cat delete. CEL recently came on and is reading codes P0100, P0108 and P0110. I’m thinking it might have something to do with my cats getting removed about a month ago, but this is the first it’s started causing decrease in MPG and making my car run sluggish. Ford dealership said 4500 to return whole exhaust to stick to fix, no. Any cheaper suggestions for possible solutions? Would a tune or new intake fix?

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