Shift Solenoid ‘A’ Open Or Short To Power
Table of contents
P0974 BUICK Possible Causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Shift Solenoid ‘A’
- Shift Solenoid ‘A’ harness is open or shorted
- Shift Solenoid ‘A’ electrical circuit poor electrical connection
How do I fix code P0974 BUICK?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0974 BUICK code
The cost of diagnosing the P0974 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0974 BUICK Description
The Powertrain Control Module (PCM) controls the ground signal for shift solenoid ‘A’ to control the solenoid ON or OFF, according to transaxle and vehicle operation. When the solenoid is OFF, filtered line pressure to the solenoid is exhausted. When energized (ON), the exhaust port is blocked, stopping the exhaust of line pressure through the solenoid. Pressure on the end of the 1-2 shift valve moves the valve against the spring force, sending line pressure into the solenoid ‘A’ passage to the 3-4 shift valve.