DTC codes / Mazda codes / P1197
P1197 on Mazda vehicles indicates that the powertrain control module (PCM) has detected an open or short circuit in the mileage switch circuit, which is used to signal the odometer or mileage-related functions. The PCM monitors the expected voltage on the circuit and sets this code when the signal is outside the normal range, often due to a faulty switch or wiring issue.
Guidance is general and written for Mazda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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