DTC codes / Chrysler codes / P1687
P1687 on Chrysler vehicles means the instrument cluster (the module that drives the gauges and warning lamps) has stopped sending its periodic status message over the interior CAN bus, so the powertrain control module (PCM) sets this code. The PCM is not reporting a cluster failure itself; it is reporting that the cluster bus message it expects every few milliseconds never arrived.
Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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