Check 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 pins.
The cost to diagnose the P1685 Dodge code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The Diagnostic Trouble Code (DTC) P1685 indicates a problem related to either your ignition key or your Immobilizer Module. This code can be triggered by various issues, such as an incorrect Vehicle Identification Number (VIN) stored in the Powertrain Control Module (PCM), the use of an invalid Sentry Key Immobilizer Module (SKIM) key, a lack of communication with the SKIM, absence of a VIN programmed in the PCM, a malfunctioning SKIM, or the presence of defective PCM or SKIM trouble codes.
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