AutoCodes – Honda – P0657 Honda

P0657 Honda Code - Actuator Supply Voltage Circuit open

Quick Answer

The Main Central Processing Unit (CPU)and driver ICs are built into the Powertrain Control Module (PCM). Common causes include Blown Fuse, Faulty Starter Cut Relay 1 (Built into the Relay Circuit Board), Starter Cut Relay 1 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 Honda indicates Actuator Supply Voltage Circuit open.
Common causes: Common causes include Blown Fuse, Faulty Starter Cut Relay 1 (Built into the Relay Circuit Board), Starter Cut Relay 1 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 13,005

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 Jan 07, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0657 Honda Description

The Main Central Processing Unit (CPU)and driver ICs are built into the Powertrain Control Module (PCM). The main CPU receives drive commands, and the driver IC drives each corresponding device. Power for the main CPU is provided from the +B BACKUP FI-ECU line via CPU power supply, and power for the driver ICs is provided from FI MAIN RLY OUT line via PGM-FI main relay 1. If the FI MAIN RLY OUT voltage is a specified voltage for a specified time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0657 Honda - Actuator Supply Voltage Circuit open - AutoCodes.com — P0657 Honda Code - Actuator Supply Voltage Circuit open

What does this mean?

What are the Possible Causes of the DTC P0657 Honda?

Blown Fuse
Faulty Starter Cut Relay 1 (Built into the Relay Circuit Board)
Starter Cut Relay 1 harness is open or shorted
Starter Cut Relay 1 circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0657 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0657 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

P0657 2016 Honda CR-V — Actuator Supply Voltage Circuit open
P0657 2017 Honda CR-V — Actuator Supply Voltage Circuit open
P0657 2018 Honda CR-V — Actuator Supply Voltage Circuit open
P0657 2019 Honda CR-V — Actuator Supply Voltage Circuit open
P0657 2020 Honda CR-V — Actuator Supply Voltage Circuit open
P0657 2021 Honda CR-V — Actuator Supply Voltage Circuit open

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.