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P1781 Diagnostic Trouble Code Discussion for October 2005

O/D Pressure Switch Sense Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1781
Help Request Posted
2004 Chevrolet Aveo LS 1.6L MIL Lamp on VIN: KL1TJ62654
P1781: Engine Speed Signal Malfunction. custemer brought to shop for eval, found and procured 1000 mile used engine, installed used engine, ran in shop fine, road test sets code, can run car on hoist,power brake etc no code, drive car downhill or level with very little throttle no code shifts fine, ...
October 09, 2005