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Home >> Chevrolet >> 2004 >> Optra Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.8L (L79) - DTC P1115 To DTC P1655 >> DTC P1397 >> Circuit Description

Circuit Description

The engine control module (ECM) determines linear wheel speed fail threshold. The ECM detects a good or failed wheel speed sensor under power conditions.

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