1999 Cadillac Deville with P0101, P0741, and P0503 Codes - Engine Swap from 2003 Northstar V8
I recently ran a diagnostic on my 1999 Cadillac Deville equipped with a swapped 2003 Northstar V8 engine. The vehicle is showing three trouble codes: P0101, P0741, and P050
P0101 indicates a performance issue with the Mass Air Flow (MAF) sensor. P0741 points to a Torque Converter Clutch (TCC) that is stuck in the 'OFF' position, which can affect gear shifting and transmission responsiveness. P0503 relates to a malfunctioning Vehicle Speed Sensor (VSS), potentially impacting speed-related functions like cruise control or ABS. I'm curious—have you retained the original 1999 PCM and MAF sensor from the base vehicle, or have they been replaced with components from the 2003 model? Additionally, could you confirm which VIN code (either 'Y' or '9') is currently installed in your current engine setup? This information may help determine compatibility issues.