I have a 2001 Jeep Grand Cherokee Limited 6Cyl 2Wdrive Automatic and the engine light stays on and the transmission does not shift from 1st to 2nd. Nor does it responsed when I engage the OD switch on the stick shift.
The system diagnostics codes came back with P1756,P1757,P1762, P0748, P1494 all related to the Governor. However, the mechanic put new ones in and test drive and still did not shift . So he took them back out (he says) and recommend a rebuild.

Unemployed and need to get my truck smog tested by April 5th. Am I being tricked into an unnecessary repair?