DTC codes / Chrysler codes / P1520
P1520 on Chrysler vehicles indicates that the Transmission Control Module (TCM) has detected a fault within the gear indicator system, which is responsible for communicating the selected gear range to the driver and other modules. The TCM monitors the electrical circuits of the gear selector and the instrument cluster display, and it sets this code when the feedback signal does not match the expected state for the current gear.
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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