P1621 Diagnostic Trouble Code Discussion for April 2012
Control Module Long Term Memory Performance
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| Help Request | Posted | |
| 2004 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK29184 P1621: Control Module Long Term Memory Performance. ... of a diesel mechanic. I have this duramax that wont start. Owner replaced his own fuel filter and after a couple hours driving he noticed lack of power and his fuel pressure was dropping down he could not remember to what (It has a chip). the next morning ... |
April 03, 2012 |
