AutoCodes – GMC – P0657 2017 GMC Sierra

P0657 2017 GMC Sierra Code - Actuator High Control Circuit Group 1

Quick Answer

The Transmission Control Module (TCM) receives information from a variety of sensors, switches, and serial data information from other control modules. Common causes include Faulty Transmission Control Solenoid Valve, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted. 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: P0657 2017 GMC Sierra indicates Actuator High Control Circuit Group 1.
Common causes: Common causes include Faulty Transmission Control Solenoid Valve, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted.
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 181

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 Jul 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0657 2017 GMC Sierra Description

The Transmission Control Module (TCM) receives information from a variety of sensors, switches, and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio, and torque converter clutch operation. The Transmission Control Solenoid Valves are electro-mechanically operated valves. The valves are controlled by an electric current through the solenoid. The TCM high side driver 1 is located inside of the control solenoid valve assembly which has no serviceable parts. The high side driver 1 provides power to the Transmission Control Module pressure control solenoids and shift solenoids. The Diagnostic Trouble Code (DTC) will be set when the TCM detects an open or short to ground or voltage on the high side driver 1 for 1 s.

OBDII Code P0657 2017 GMC Sierra - Actuator High Control Circuit Group 1 - AutoCodes.com — P0657 2017 GMC Sierra Code - Actuator High Control Circuit Group 1

What does this mean?

What are the Possible Causes of the DTC P0657 2017 GMC Sierra?

Faulty Transmission Control Solenoid Valve
Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC P0657 2017 GMC Sierra?

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 P0657 2017 GMC Sierra 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 P0657 2017 GMC Sierra code?

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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 P0657 2017 GMC Sierra Code

1. What does OBDII code P0657 for a 2017 GMC Sierra mean?

The code P0657 indicates a problem in the Actuator High Control Circuit Group 1 of the vehicle.

2. What are the common symptoms of OBDII code P0657 in a 2017 GMC Sierra?

Common symptoms include issues with engine performance, reduced fuel efficiency, and the illumination of the Check Engine light on the dashboard.

3. What are the possible causes of OBDII code P0657 in a 2017 GMC Sierra?

Potential causes of this code include a faulty actuator, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).

4. How can I diagnose the OBDII code P0657 in my 2017 GMC Sierra?

Diagnosing this code typically involves using a scan tool to retrieve the specific fault code, checking the actuator and its connections for any visible damage, and testing the circuit for continuity and proper voltage.

5. Can I still drive my 2017 GMC Sierra with OBDII code P0657 present?

It is not recommended to drive the vehicle with an unresolved P0657 code as it can lead to further damage or poor engine performance. It is advisable to address the issue promptly.

6. How do I repair OBDII code P0657 in a 2017 GMC Sierra?

Repairing this code may involve replacing the faulty actuator, repairing or replacing damaged wiring/connectors, or reprogramming the PCM to address any control module issues.

7. Are there any DIY tips for fixing OBDII code P0657 in a 2017 GMC Sierra?

While some basic troubleshooting steps can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair of this code.

8. How much does it cost to fix OBDII code P0657 in a 2017 GMC Sierra?

The cost of fixing this code can vary depending on the exact cause of the issue, parts needed for replacement, labor costs, and whether you choose to fix it yourself or seek professional help.

9. Can a bad battery cause OBDII code P0657 to appear in a 2017 GMC Sierra?

A weak or faulty battery can sometimes trigger false error codes like P0657. It is advisable to ensure the battery is in good condition before diagnosing other potential causes.

10. Is it important to clear OBDII code P0657 after repairing it in a 2017 GMC Sierra?

Yes, it is important to clear the code after fixing the underlying issue to reset the Check Engine light and monitor the vehicle's performance for any recurring problems.