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Check engine light code 511 and 522


Scott_Meier

Member
Joined
Aug 8, 2024
Messages
18
City
Eureka
Vehicle Year
1993
Transmission
Manual
I have a 93 4.0 manual..I got a salvage yard motor was out of a automatic I started getting code 511 and 522 I had a bad computer so I replaced it n I still get that code what can I do on thease
 
I have a 93 4.0 manual..I got a salvage yard motor was out of a automatic I started getting code 511 and 522 I had a bad computer so I replaced it n I still get that code what can I do on thease
It has new injectors new fuel pump and pressure regulator... new plugs and wires new coil pack and fuel filter... plus found a vaccuum leak and fixed it so idk what else I can do
 
511(O) No power to PCM pin 1 or bad PCM (processor)
512(M) Memory power (PCM pin 1) was interrupted – Was battery disconnected ?

Just for reference so they'll be here.^

I've had things apart many times and don't remember ever getting either of these. Normally I would suggest clearing codes and trying again, but the only way I know of to clear codes on OBD1 is to remove power. Which is exactly what those codes are for... Maybe drive it enough cycles for the code to clear unless you have other problems?
 
511(O) No power to PCM pin 1 or bad PCM (processor)
512(M) Memory power (PCM pin 1) was interrupted – Was battery disconnected ?

Just for reference so they'll be here.^

I've had things apart many times and don't remember ever getting either of these. Normally I would suggest clearing codes and trying again, but the only way I know of to clear codes on OBD1 is to remove power. Which is exactly what those codes are for... Maybe drive it enough cycles for the code to clear unless you have other problems?
Well it was disconnected when i put the computer in it this code was the reason I got a different computer same codes with this computer vs old computer
 

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