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Diagnostic trouble code C1239 indicates: Sistema de Frenos Antibloqueo (ABS) Hidráulico Presión Diferencial Interruptor Entrada Abierto Circuito. It was set by your vehicle's onboard diagnostics system and will typically keep the check engine light on until it's addressed.
Upload your ECU file and DTC Doctor will detect this code (and any others) automatically, then remove it for good — no dealer visit, no guesswork.
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