1998 Chrysler Voyager 2.4L Auto LE DTC P0760: Diagnosis and Root Cause Analysis
I own a 1998 Chrysler Voyager Automatic LE 2.4L LHD (VIN: 1C4GYB2B5WU526918) that is currently displaying only DTC P0760, which triggers limp-home mode. After performing a pin-point diagnostic from the TCM down to the solenoid and pressure switch assembly, no electrical or mechanical anomalies were detected. The TCM has already been ruled out via replacement testing, but I do not have access to a replacement solenoid assembly—there is currently an estimated 2-week lead time for delivery. My core question remains: What exactly does the P0760 system monitor to trigger this diagnostic trouble code? For instance, if the system relies on back EMF detection during solenoid operation, then a shorted winding in the solenoid might not be detectable through resistance testing but could still suppress the expected back EMF signal. Conversely, if the system only monitors current draw when energizing the solenoid, a shorted turn may go undetected. Understanding how the P076-0 detection mechanism works is critical before proceeding with further repairs or replacements. Can anyone clarify whether this code is primarily related to current flow, voltage regulation, or back EMF sensing in the OD (overdrive) solenoid circuit?
DTC P0760 specifically relates to the overdrive (OD) solenoid circuit and indicates a current flow issue. First, try swapping the transmission shutdown relay with a known good one—this can quickly isolate whether the problem lies in the wiring or the solenoid itself. If the code persists after this step, check the resistance across the solenoid circuit. A failed solenoid pack or faulty wiring could be responsible. Don’t immediately assume a TCM issue—when a TCM generates P0760, it’s often due to a downstream component failure rather than a module malfunction.