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P1781 Diagnostic Trouble Code Discussion for February 2006

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 VIN: KL1TD62604
P1781: Engine Speed Signal Malfunction. Vehicle developes an intermintent miss usually after returning to idle. Customer had spark plugs replaced before bring the car to us. The car will run fine at higher rpm's and develope a miss upon returning to idle. After returning to idle the car will smooth ...
February 10, 2006