AutoCodes – Lexus – C164A Lexus

C164A Lexus Code - EPS Communication Malfunction

Quick Answer

The power steering system receives advanced parking guidance system information from the Parking Assist ECU via CAN communication. Common causes include Faulty Parking Assist ECU, Faulty Power Steering ECU. 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: C164A Lexus indicates EPS Communication Malfunction.
Common causes: Common causes include Faulty Parking Assist ECU, Faulty Power Steering ECU.
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 749

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Nov 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C164A Lexus Description

The power steering system receives advanced parking guidance system information from the Parking Assist ECU via CAN communication. This Diagnostic Trouble Code (DTC) is stored if the Parking Assist ECU receives abnormal signals from the power steering ECU.

OBDII Code C164A Lexus - EPS Communication Malfunction - AutoCodes.com — C164A Lexus Code - EPS Communication Malfunction

What does this mean?

What are the Possible Causes of the DTC C164A Lexus?

Faulty Parking Assist ECU
Faulty Power Steering ECU

How to Fix the DTC C164A 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 C164A 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 C164A Lexus Code

1. What does the OBDII code C164A mean on a Lexus?

C164A indicates an EPS (Electric Power Steering) Communication Malfunction, meaning there is a loss of communication between the power steering control module and other components.

2. What are the common symptoms of the C164A code?

Symptoms may include the EPS warning light illuminating on the dashboard, heavy or unresponsive steering, or intermittent loss of power steering assist.

3. What causes the C164A code to appear?

Common causes include a faulty EPS control module, damaged wiring or connectors in the EPS communication circuit, or issues with the CAN (Controller Area Network) bus system.

4. Can I continue driving with the C164A code?

Driving with this code may be possible, but it can be dangerous due to potential loss of power steering assist, making the vehicle harder to steer, especially at low speeds.

5. How is the C164A code diagnosed?

A technician will use a diagnostic scan tool to check for additional codes, inspect the EPS module and wiring for damage, and test the communication signals on the CAN bus.

6. What repairs are needed to fix the C164A code?

Repairs may include replacing a faulty EPS control module, repairing or replacing damaged wiring or connectors, or resolving CAN bus communication issues.

7. How much does it cost to fix the C164A code on a Lexus?

Repair costs vary depending on the issue but typically range from $200 to $1,500, depending on whether wiring repairs or module replacements are required.

8. Can a weak battery cause the C164A code?

Yes, a weak or failing battery can cause communication errors, including the C164A code, as the EPS system requires sufficient voltage to operate correctly.

9. Is the C164A code specific to Lexus vehicles?

While the code is specific to Lexus and some Toyota models, other manufacturers may have similar codes for EPS communication issues.

10. Can I reset the C164A code without repairs?

Clearing the code without addressing the underlying issue may temporarily turn off the warning light, but the problem is likely to recur until properly repaired.