do yall know what this is? it said pressure solonoid, so im assuming tranny? i only got it one time with 0121, and havent seen it in a couple of days. any help is very welcome...

 

TTT.......... I would like to know also.

 

P0748 - Pressure regulating solenoid electrical problem in the tranny. It’s open or short circuited. This will put you into a limp home mode. Your shift pressure goes to maximum and causes harsh gear shifts/engagement.

P0121 – Throttle Position Sensor/Switch A Circuit Range/Performance Problems

Both are electrical........

 

P0748 ............Could this be caused by a B&M electronic shift improver?