My 2001 GMC K2500 HD SL 4x4 have the p1779 and p0847 codes

Question

I have an error code on a 2001 GMC K2500 HD SL 4x4 truck how do I repair it?

Answer 1

P1779 Engine torque signal below lower limit detected

P0847 Pressure switch manifold

P1779 is a code condition where there is no "delivered torque signal"either from the TCM to the ECM, P01779 can be the result of P0847 which is a high priority code which will inhibit TCC (torque convertor clutch) this is a problem with the manifold pressure switch assembly