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Home >> Saturn >> 2000 >> LS1 Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transaxle Diagnosis - 4T40-E & 4T45-E >> Diagnostic Tests >> DTC P0730: Incorrect Gear Ratio >> Circuit Description

Circuit Description

PCM calculates gear ratio based on transaxle input and output speed sensor readings. PCM compares known transaxle gear ratio to calculated ratio for particular gear range selected. DTC P0730 will set when PCM detects an unknown transaxle gear ratio.

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