AutoCodes – Chevrolet – P0977 2014 Chevrolet Silverado

P0977 2014 Chevrolet Silverado Code - Shift Solenoid 'B' Open Or Short To Power

Quick Answer

The shift solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0977 2014 Chevrolet Silverado indicates Shift Solenoid 'B' Open Or Short To Power.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 463

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0977 2014 Chevrolet Silverado Description

The shift solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. The shift solenoid 2 is a normally closed ON/OFF solenoid and is controlled by the Transmission Control Module through a low side driver. When the shift solenoid 2 is energized, shift solenoid 2 fluid pressure is directed to the clutch select valve 3. Power to the shift solenoid 2 is supplied by the Transmission Control Module through a high-side driver. The high-side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high-side driver will reset. The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module detects an internal high voltage electrical malfunction of the shift solenoid 2 control circuit when the shift solenoid 2 is commanded ON for 2 seconds.

OBDII Code P0977 2014 Chevrolet Silverado - Shift Solenoid 'B' Open Or Short To Power - AutoCodes.com — P0977 2014 Chevrolet Silverado Code - Shift Solenoid 'B' Open Or Short To Power

What does this mean?

What are the Possible Causes of the DTC P0977 2014 Chevrolet Silverado?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve
Transmission Control Solenoid Valve harness is open or shorted
Transmission Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P0977 2014 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0977 2014 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0977 2014 Chevrolet Silverado code?

Need more information on how to fix the P0977 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0977 2014 Chevrolet Silverado Code

1. What does the OBDII code P0977 mean on a 2014 Chevrolet Silverado?

P0977 indicates an issue with the shift solenoid 'B,' specifically that it has an open circuit or a short to power, which affects the transmission's ability to shift gears properly.

2. What are the common symptoms of the P0977 code in a 2014 Chevrolet Silverado?

Symptoms include harsh or delayed shifting, being stuck in one gear, transmission slipping, a check engine light, and potentially reduced fuel efficiency.

3. What causes the P0977 code to appear in a 2014 Chevrolet Silverado?

Typical causes include a faulty shift solenoid 'B,' damaged wiring or connectors, transmission fluid contamination, or an issue with the transmission control module (TCM).

4. Can I drive my 2014 Chevrolet Silverado with the P0977 code?

While you may still be able to drive, it is not recommended as continued operation with this issue can lead to further transmission damage and unsafe driving conditions.

5. How do I diagnose the P0977 code on a 2014 Chevrolet Silverado?

Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the shift solenoid 'B' and related wiring for damage, checking the transmission fluid condition, and testing the TCM.

6. What is the shift solenoid 'B' in a 2014 Chevrolet Silverado?

The shift solenoid 'B' is an electronic component inside the transmission that helps control hydraulic fluid flow to enable gear changes.

7. How much does it cost to repair the P0977 code on a 2014 Chevrolet Silverado?

The repair cost can vary, but replacing a shift solenoid typically costs between $150 and $400, depending on labor rates and parts pricing.

8. Can low or dirty transmission fluid cause the P0977 code?

Yes, low or contaminated transmission fluid can impede proper solenoid operation, potentially triggering the P0977 code.

9. How can I prevent the P0977 code from occurring in my 2014 Chevrolet Silverado?

Regular maintenance, including timely transmission fluid changes and inspections of the wiring and connectors, can help prevent this issue.

10. Does the P0977 code always mean the shift solenoid 'B' is faulty?

Not necessarily. The code could also be caused by wiring issues, poor electrical connections, or problems with the TCM, so a thorough diagnosis is essential.