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01-17-2024, 02:26 PM
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#29 |
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Senior Member
Join Date: Jan 2017
Drives: brz 2017 hksv2
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A p0420 definitely doesn t stop LTFT
Only certain dtc's i believe It may or may not, depends on the case i had a damaged primary o2 sensor which went a lot leaner (its 14.7 would be a 20-21 of real afr when warm) and the ecu wasn't happy of something during the cold start so it delayed LTFT while LTFT was delayes, fuel trims were limited to "only" -35% or so when ltft activated suddenly the trims went -80% and the car was extremely lean Cold start has a "fuel system status" of 1 So if something messes with the cold start conditions and fuel system status stucks at 1 , ltft doesn't start |
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| The Following User Says Thank You to tomm.brz For This Useful Post: | Compelica (01-22-2024) |
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| boosted, ecutek, knock |
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