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P0138 code

146 Views 2 Replies 2 Participants Last post by  KeithyCoop
Our R52 Cooper S has just thrown up the P0138 code which I thought was something to do with the post cat lambda, but my BMW/Mini scanner says before cat.

Anyone got any idea, I had a new pre cat lambda fitted in Dec as a serviceable item, but wondered if I should refit the orginal?

I can’t hear any exhaust leaks, but it needs to go on a ramp for a better check.

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The post sensors are almost redundant, itll be the pre Id bet, stick the original one on and see what it does.
Cheers, I’ve tried but can’t budge it from the top, so off to a ramp to get under it.
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