P1421 Diagnostic Trouble Code Discussion for January 2004
Cold Start Emission Reduction Strategy Monitoring
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P1421
| Help Request | Posted | |
| 1999 BMW 323i 2.5L Hesitation, MIL Lamp on, VIN: WBAAM3333X P1421: manufacturer controled emission device malf. ... it since july 03. It began to hesitate in October very slightly on acceleration under 2000 rpms. i checked for trouble codes and none were present. i checked Mitchell and AllData for any reference to the problem and found non. I checked the Datastream data... |
January 06, 2004 |
