AutoCodes – Toyota – C1657 Toyota

C1657 Toyota Code - Hybrid Powertrain Control Module

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when the Parking Assist ECU receives a hybrid control system malfunction signal from the hybrid control system via CAN communication. Common causes include Faulty Hybrid Powertrain Control Module, Hybrid Powertrain Control Module harness is open or shorted, Hybrid Powertrain Control Module 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: C1657 Toyota indicates Hybrid Powertrain Control Module.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module, Hybrid Powertrain Control Module harness is open or shorted, Hybrid Powertrain Control Module 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 5,359

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 Nov 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1657 Toyota Description

This Diagnostic Trouble Code (DTC) is stored when the Parking Assist ECU receives a hybrid control system malfunction signal from the hybrid control system via CAN communication.

OBDII Code C1657 Toyota - Hybrid Powertrain Control Module - AutoCodes.com — C1657 Toyota Code - Hybrid Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC C1657 Toyota?

Faulty Hybrid Powertrain Control Module
Hybrid Powertrain Control Module harness is open or shorted
Hybrid Powertrain Control Module circuit poor electrical connection

How to Fix the DTC C1657 Toyota?

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 C1657 Toyota 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 C1657 Toyota Code

1. What does OBDII code C1657 for Toyota Hybrid Powertrain Control Module mean?

The code C1657 indicates a communication error between the hybrid powertrain control module and other vehicle modules.

2. What are the common symptoms of OBDII code C1657 in a Toyota vehicle?

Common symptoms include loss of power, poor fuel efficiency, warning lights on the dashboard, and potential stalling issues.

3. What are the possible causes of OBDII code C1657 in a Toyota hybrid vehicle?

Potential causes include faulty wiring connections, damaged sensors, a malfunctioning powertrain control module, or issues with the hybrid battery system.

4. How can I diagnose OBDII code C1657 in my Toyota vehicle?

Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the wiring and connections for any issues, and testing the sensors and control module for proper functionality.

5. Can I drive my Toyota with OBDII code C1657?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

6. How can I repair OBDII code C1657 in my Toyota hybrid vehicle?

Repairing the code may involve fixing wiring issues, replacing faulty sensors or modules, resetting the system, or seeking assistance from a professional mechanic for a thorough diagnosis and repair.

7. Is it safe to reset the OBDII code C1657 in my Toyota without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily clear the warning lights, but the issue will likely reappear, potentially causing more serious problems in the future.

8. How much does it cost to repair OBDII code C1657 in a Toyota hybrid vehicle?

The cost of repair can vary depending on the specific cause of the code, the extent of the damage, and whether any parts need to be replaced. It's advisable to consult a mechanic for an accurate estimate.

9. Can OBDII code C1657 in a Toyota be prevented?

Regular maintenance, timely repairs of any related issues, and proper care of the hybrid system can help prevent the occurrence of code C1657 in a Toyota vehicle.

10. How long does it typically take to repair OBDII code C1657 in a Toyota?

The repair time can vary based on the complexity of the issue and the availability of parts. Simple fixes may take a few hours, while more extensive repairs could require leaving the vehicle at the repair shop for a day or longer.