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P1781 Diagnostic Trouble Code Discussion for April 2015

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 MIL Lamp on VIN: KL1TD52654
P1781: Engine Speed Signal Malfunction. these 3 codes p0300 p0700 91781 keep coming back as soon as you get to 20 mph we did the valve bulliten 05-06-01-030d and all where replaced with new seals. runs fine also speedo only reads half of speed going installed new speed sensor and did not change than...
April 09, 2015
2004 Chevrolet Aveo 1.6L MIL Lamp on VIN: KL1TD52654
P1781: Engine Speed Signal Malfunction. these 3 codes p0300 p0700 91781 keep coming back as soon as you get to 20 mph we did the valve bulliten 05-06-01-030d and all where replaced with new seals. runs fine also speedo only reads half of speed going installed new speed sensor and did not change than...
April 13, 2015