please help

[smidree]

ive got some codes from my 1990 b250 5.2 318 and now dont know what they are if someone could help the codes are 12,17,42,42,55 thanks in advance

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[alloro]

CODE 12 Problem with battery connection.Direct battery input to pcm disconnected within the last 50 ignition key-on cycles.
CODE 17 Engine is cold to long.Engine coolant temp stays below normal operating temp(check thermostat).
CODE 42 Fuel pump relay or auto shutdown relay (ASD) control circuit indicates an open or shorted condition.
CODE 55 Completion of fault code display on check engine lamp.this is end of message code.

[smidree]

thank you very much

[stev]

With CODE 17, you may need a coolant flush/change to the correct mixture level too.

[alloro]

You listed code 42 twice. Was that a typo or is the second code 42 supposed to be something else?

[smidree]

no it was a second 42 code i thought it was strange myself