AutoCodes – Lexus – C1657 Lexus

C1657 Lexus 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 Lexus 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 971

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 Lexus 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 Lexus - Hybrid Powertrain Control Module - AutoCodes.com — C1657 Lexus Code - Hybrid Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC C1657 Lexus?

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 Lexus?

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 Lexus 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 Lexus Code

1. What are common symptoms of OBDII code C1657 in a Lexus hybrid vehicle?

- Common symptoms include reduced hybrid system performance, warning lights on the dashboard, and potential drivability issues.

2. What causes the OBDII code C1657 to trigger in a Lexus hybrid?

- The code is often triggered by issues with the hybrid powertrain control module, such as internal malfunctions or communication errors.

3. How can I diagnose the OBDII code C1657 in my Lexus hybrid?

- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific fault codes and inspecting the hybrid powertrain control module for any visible damage.

4. Can I drive my Lexus hybrid with the OBDII code C1657 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid powertrain components.

5. What are some repair tips for fixing the OBDII code C1657 in a Lexus hybrid?

- Repairing this code may involve reprogramming or replacing the hybrid powertrain control module, as well as addressing any underlying issues causing the fault.

6. Is it safe to reset the OBDII code C1657 in a Lexus hybrid without fixing the underlying problem?

- It is not recommended to reset the code without addressing the root cause, as the issue may persist and potentially worsen over time.

7. How much does it typically cost to repair the OBDII code C1657 in a Lexus hybrid?

- The cost of repairing this code can vary depending on the extent of the damage and the specific repairs needed, but it may range from a few hundred to over a thousand dollars.

8. Can a DIY enthusiast fix the OBDII code C1657 in a Lexus hybrid?

- While some basic troubleshooting steps can be taken by DIY enthusiasts, repairing this code often requires specialized tools and knowledge, so it is recommended to consult a professional mechanic.

9. Will the OBDII code C1657 cause my Lexus hybrid to fail an emissions test?

- Yes, having this code present may cause your vehicle to fail an emissions test, as it indicates a problem with the hybrid powertrain control module.

10. How can I prevent the OBDII code C1657 from triggering in my Lexus hybrid in the future?

- Regular maintenance and inspections, as well as addressing any related issues promptly, can help prevent the recurrence of this code in your Lexus hybrid.