AutoCodes – Honda – P0977 Honda

P0977 Honda Code - Shift Solenoid Valve 'B' Circuit High

Quick Answer

Shift Solenoid Valve 'B' controls the drain circuit close/open commanded by the Powertrain Control Module (PCM) ON/OFF commands. Common causes include Faulty CVT Clutch Pressure Control Solenoid Valve 'B', CVT Clutch Pressure Control Solenoid Valve 'B' harness is open or shorted, CVT Clutch Pressure Control Solenoid Valve 'B' circuit poor electrical connection. 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 Honda indicates Shift Solenoid Valve 'B' Circuit High.
Common causes: Common causes include Faulty CVT Clutch Pressure Control Solenoid Valve 'B', CVT Clutch Pressure Control Solenoid Valve 'B' harness is open or shorted, CVT Clutch Pressure Control Solenoid Valve 'B' circuit poor electrical connection.
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 17,155

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 Jun 23, 2025

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
Comments
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Code P0977 Honda Description

Shift Solenoid Valve 'B' controls the drain circuit close/open commanded by the Powertrain Control Module (PCM) ON/OFF commands. Oil passages that supply/discharge the oil pressure to torque converter clutch is switched by the shift solenoid valve B ON/OFF control. The PCM commands the driver circuit to turn on the shift solenoid valve B. The circuit diagnoses malfunctions such as a circuit short or open and sends back a return signal during the PCM's command. When the return signal does not match the PCM command to turn ON the shift solenoid valve B, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0977 Honda - Shift Solenoid Valve 'B' Circuit High - AutoCodes.com — P0977 Honda Code - Shift Solenoid Valve 'B' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0977 Honda?

Faulty CVT Clutch Pressure Control Solenoid Valve 'B'
CVT Clutch Pressure Control Solenoid Valve 'B' harness is open or shorted
CVT Clutch Pressure Control Solenoid Valve 'B' circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0977 Honda?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0977 Honda 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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Information for Specific Honda Models

P0977 2016 Honda CR-V — Shift Solenoid Valve 'B' Circuit High
P0977 2017 Honda CR-V — Shift Solenoid Valve 'B' Circuit High
P0977 2018 Honda CR-V — Shift Solenoid Valve 'B' Circuit High
P0977 2019 Honda CR-V — Shift Solenoid Valve 'B' Circuit High
P0977 2020 Honda CR-V — Shift Solenoid Valve 'B' Circuit High
P0977 2021 Honda CR-V — Shift Solenoid Valve 'B' Circuit High

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.