P0977 CADILLAC - Shift Solenoid 'B' Open Or Short To Power
P0977 CADILLAC Possible Causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 'B' valve
- Shift solenoid 'B' valve harness or connectors
- Shift solenoid 'B' valve circuit is open or shorted
First diagnose P0977 CADILLAC code
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 terminals.
Cost of diagnosing the P0977 CADILLAC code
Labor: 1.0The cost of diagnosing the P0977 CADILLAC 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.
P0977 CADILLAC Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0977 Cadillac DescriptionThe Powertrain Control Module (PCM) controls the ground signal for shift solenoid B 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, and directing it into the solenoid B passage. Solenoid B fluid pressure is then fed to the 4-3 manual downshift valve and the 3-2 manual downshift valve.
P0977 CADILLAC More InformationNeed more information on how to fix the P0977 CADILLAC code?
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