Understanding and fixing BMW Fault Code P1421 Now! quickly and easily
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Nissan code p1421- cold start control malfunction. In this video i cleaned the throttle body as that was causing my fault. There is a tsb from nissan to reflash the ecm. Also can be caused By a vacuum leak and a clogged airfilter/ intake boot. #mechaniclife #nissan #fyp#carsoftiktok #diy
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