Automotive Training Group's 2012 Chrysler engine performance 7-hour course and training manual covers the best diagnostic techniques for these vehicles. These manuals cover a number of both new and old Chrysler systems, partial throttle-by-camshaft engines with low-idle vacuum, new air injection systems, and the GPEC PCM. Diagnostic techniques include multiple methods to find timing faults without disassembly, Fuel Trim diagnostic tips, methods for finding elusive Rear Fuel Trim faults, O2 sensor "goal voltage," the root cause of misleading CMP and CKP sensor codes, finding failed PCM drivers, and simple methods for diagnosing LDP, ESIM and NVLD EVAP failures.