Join Now
International Automotive Technicians Network

P1621 Diagnostic Trouble Code Discussion for June 2007

Control Module Long Term Memory Performance


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 P1621
Help Request Posted
2001 Mazda Miata 1.8L No Start, MIL Lamp on VIN: JM1NB35371
P1621: Key Identification Number Not Registered In The PCM. Hello and thanks ahead of time. This 2001 Miata is a flood car that someone else brought back to life. It has been running about a year, then it quit running. I couldn't communicate with my OTC Genisys. I had to repair some butchered wires. I got a used ECU an...
June 26, 2007
2001 Mazda Miata 1.8L No Start, MIL Lamp on VIN: JM1NB35371
P1621: Key Identification Number Not Registered In The PCM. Hello and thanks ahead of time. This 2001 Miata is a flood car that someone else brought back to life. It has been running about a year, then it quit running. I couldn't communicate with my OTC Genisys. I had to repair some butchered wires. I got a used ECU an...
June 26, 2007