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by eliasreeves
Thu Jan 09, 2020 8:38 pm
Forum: R51 Engine, Driveline and Powertrain
Topic: What brand Cat and what about Doug Thorley Mid Pipes?
Replies: 6
Views: 3441

My left bank converter was doing the same thing as yours. I put an oxygen sensor spacer on the rear sensor on that bank and it only trips the CEL about once a month, compared to every 3-4 days without it. I used a straight spacer, but I wonder if a 90-degree spacer might have eliminated the CEL alt...

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