DTC codes / Chrysler codes / P1530
P1530 on Chrysler vehicles indicates that the powertrain control module (PCM) has detected an unexpected signal from the ignition timing adjustment switch circuit, which is used on some models to allow manual timing adjustment for service or diagnostic purposes. The PCM monitors the switch input and sets this code when the circuit voltage falls outside the expected range for the current switch position, or when the signal is erratic.
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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