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Posts Tagged: Nissan P1421

P1421 code on Nissan Versa — Service Bulletin Fix

Diagnose and fix P1421 code on Nissan Versa — Service Bulletin Fix Nissan has issued a service bulletin # NTB09-116a to address a P1421 code COLD START CONTROL trouble code on all 2007 – 2010 Versa models with the MR18DE engine ONLY. The check engine light will appear and this Nissan P1421 code will be stored. You won’t notice any drivability issues. Nissan service bulletin # NTB09-116a The bulletin advises owners to update the ECM software with a newer version. However, before you do that, shops find that cleaning the … Read More


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