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Re: 1992 Beretta Stalls/MAP sensor but computer shows fine
both codes 33 and 34 indicate a bad map sensor, or the circuit to it. Code 33 is a generic MAP sensor code, indicating possible wiring, connection, vacuum supply or the MAP itself. Code 34 indicates a low voltage signal from the MAP to the ECM. IF you haven't changed the MAP sensor yet, do so as the codes you are getting are indicating it is the issue.
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Still waiting for the "good old days" I'll get to bore my future grandchildren with!
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