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| 06-13-2023, 11:33 AM | #1 |
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Private
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Why am I getting 29F4 & 29F5 with catless downpipes?
Hello -- I'm MHG stage 2+ mapped. Can anyone tell me why the tune is reporting 29F4 and 29F5 which is essentially the generic catalyst efficiency below threshold? I thought the cat check was disabled in MHD? I have the tune set to Aftermarket Downpipes.
A MHD scan shows 29F4 and 29F5 as shadow codes. I also have 29E1 Mixture control 2 as an active code but no SES light. I'm guessing that my bank 2 O2 sensor may be in early stages of failure, but I am perplexed on why the tune is even returning a catalyst efficiency below threshold code when I didn't think it was even checking that. Thoughts?? |
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