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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 P0752: 1-2 Shift Solenoid Valve Performance (No 2ND Or 3RD Gear) >> Circuit Description

Circuit Description

The 1-2 shift solenoid valve is a normally-open exhaust valve that is used in conjunction with 2-3 shift solenoid valve, allows four different shifting combinations. The 1-2 shift solenoid valve is attached to control valve body, within transaxle. PCM monitors actual gear ratio, and compares actual gear ratio with commanded gear ratio. DTC P0752 sets when PCM detects a 1-1-4-4 shift pattern.