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P1781 Diagnostic Trouble Code Discussion for September 2009

O/D Pressure Switch Sense Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1781
Help Request Posted
2004 Chevrolet Aveo 1.6L Misfire, MIL Lamp on VIN: KL1TD52624
P1781: Engine Speed Signal Malfunction. ... problem. vehical came in with codes p0700 and p1781 traced problem to tcm(trans control module), after replacing module now getting code p0300 i don't feel a miss while driving (thats when light comes on and flashes) engine runs little rough at idle. have ...
September 14, 2009