Cadillac P1621: Control Module Long Term Memory Performance
Is your scanner showing Cadillac P1621?
No worries. We'll show you what it means and how to deal with it.
Cadillac P1621: Control Module Long Term Memory Performance
OVERVIEWWhat Does The Cadillac P1621 Code Mean?
Key on, and the PCM detected a malfunction occurred while reading the non-volatile memory during the initial power-up.
How Can You Fix The Cadillac P1621 Code?
- Perform the Diagnostic System Check for the Engine Controls
- PCM may have failed. Clear codes and then retest for the same code. If this codes resets, replace the PCM and reprogram it.
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> GM Genuine Parts 12633238 Engine Control Module
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
