April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code 1623, Prom Error

Check that PROM is correctly inserted in socket. If okay, replace PROM, clear memory and recheck. If Code P1623 reappears, replace control module.

NOTE: To prevent possible electrostatic discharge damage to control module or PROM, DO NOT touch component leads. DO NOT remove integrated circuit from carrier.