[amidgeha]

Shift Solenoid (B)

Shift solenoid valve B is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.

Cause:
Low transmission fluid level
Dirty transmission fluid
Faulty shift solenoid "B" valve
Shift solenoid "B" valve harness is open or shorted
Shift solenoid "B" valve circuit poor electrical connection

Symptoms:
Check engine light
Transmission will not shift gears.