AutoCodes – Dodge – P0977 Dodge

P0977 Dodge Code - Shift Solenoid 'B' Control Circuit High

Quick Answer

The 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. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'B' 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 Dodge indicates Shift Solenoid 'B' Control Circuit High.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'B' 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 4,871

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 May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0977 Dodge Description

The 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.

OBDII Code P0977 Dodge - Shift Solenoid 'B' Control Circuit High - AutoCodes.com — P0977 Dodge Code - Shift Solenoid 'B' Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0977 Dodge?

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

How to Fix the DTC P0977 Dodge?

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 Dodge 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.

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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 Dodge Code

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Patrick
Date: December 9, 2016 at 5:13 pm

My 2009 chevy aveo has a flashing hold light and won't shift from 2nd gear. Got PO977 fault code. How can I resolve this?

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OBDIITech
Date: December 13, 2016 at 10:46 pm

Start by checking the transmission fluid level and condition. If the fluid is OK, then you may have to replace the shift solenoid.
P0977 CHEVROLET - Shift Solenoid 'B' Open Or Short To Power
Read more: http://www.autocodes.com/p0...

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