Advanced Diagnostics

Advanced Diagnostics - DTC P0757: Shift Solenoid Valve B Stuck ON
















General Description
Shift solenoid valve B is installed on the transmission housing. It is controlled by the ON/OFF signal from the powertrain control module (PCM) to apply line pressure to shift valve B. A signal from the PCM is output to apply A/T clutch pressure control solenoid valve pressure to the correct gear clutch according to the shift schedule. When the signal to shift solenoid valve B from the PCM is on, and the line pressure is applied to shift valve B, it operates against the shift valve B spring. When the signal to shift solenoid valve B from the PCM is off, and the line pressure is discharged, shift valve B is inactive. The PCM monitors the transmission fluid pressure switch according to the shift status determined by the shift schedule. When the wrong transmission fluid pressure switch is on for the shift schedule, the PCM detects a shift solenoid valve B stuck on failure and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold






Driving Pattern
1. Start the engine.
2. Drive the vehicle until the transmission shifts into 6th gear.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.