The manual includes an appendix of 3-digit Ford codes (e.g., 121 – Throttle Position Sensor out of range, 334 – EGR closed valve voltage high). For GM and Chrysler, the manual instructs you to switch to “UNIVERSAL” mode, which outputs 2-digit codes.

Safety instructions generally focus on heat management and environmental exposure. Although designed for shop use, the manual advises against submerging the unit or using it in proximity to highly flammable chemical spills. Troubleshooting steps typically address common issues like "flickering" (indicating a low charge) or a failure to extend (suggesting debris in the sliding tracks). Conclusion