P1781 Diagnostic Trouble Code Discussion for November 2005
O/D Pressure Switch Sense Circuit Malfunction
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| Help Request | Posted | |
| 2001 GMC Sierra 2500 HD SL 8.1L No Start P1781: eng torque or mil request fault. This truck will not start after the customer has been driving it and parks it for a short time. Sometimes it's just a extended crank time before it will start and some times it takes a hour or more before it will start again. Truck will run fine after each epi... |
November 19, 2005 |
