Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the P0942 MERCURY code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Transmission Control Module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration. Install a new mechatronic unit. If transmission fluid is contaminated, install a new transaxle.
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