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P1623 Diagnostic Trouble Code Discussion for February 2009

Code Word or Key ID Number Read/Write Error in the PCM

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Trouble Ticket Help Requests for DTC P1623
Help Request Posted
2001 Hyundai Accent GL 1.6L MIL Lamp on VIN: KMHCG45C21
P1623: no info. ... few days, and cannot find any info on code p1633.had code po133. o2 slow response.along with p1623.found leak at manifold next to sensor.cleared but still code p1633 comes on right after start.does not turn light on .its just in history. would not worry ab...
February 12, 2009
2001 Mazda MPV DX 2.5L No Start VIN: JM3LW28Y21
P1623: Code Word or Key ID Number Read/Write Error In PCM. ... thieft system in the pcm. We replaced the pcm with a remanufactured unit. Upon replacement we've attempted to perform the (what we think)code word write into into the pcm using the processe that alldata uses by turning different keys on and off with no suc...
February 24, 2009