AutoCodes – Lexus – C1582 Lexus

C1582 Lexus Code - Assist Map Number Mismatch

Quick Answer

When an incorrect ECM, an incorrect brake actuator assembly or an incorrect main body ECU is installed after the assist map has been written in the power steering ECU assembly, then Diagnostic Trouble Code (DTC) C1582/26 is stored because the data does not match the vehicle specifications. Common causes include Incorrect Engine Control Module (ECM), Incorrect Skid Control ECU (Brake Actuator Assembly), Incorrect Main Body ECU (Multiplex Network Body 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: C1582 Lexus indicates Assist Map Number Mismatch.
Common causes: Common causes include Incorrect Engine Control Module (ECM), Incorrect Skid Control ECU (Brake Actuator Assembly), Incorrect Main Body ECU (Multiplex Network Body 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 854

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 Feb 26, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code C1582 Lexus Description

OBDII Code C1582 Lexus - Assist Map Number Mismatch - AutoCodes.com — C1582 Lexus Code - Assist Map Number Mismatch

What does this mean?

What are the Possible Causes of the DTC C1582 Lexus?

Incorrect Engine Control Module (ECM)
Incorrect Skid Control ECU (Brake Actuator Assembly)
Incorrect Main Body ECU (Multiplex Network Body ECU)
Faulty Power Steering ECU

How to Fix the DTC C1582 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 C1582 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.

Need more information about the C1582 Lexus 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 C1582 Lexus Code

1. What are the common symptoms of OBDII code C1582 (Lexus) - Assist Map Number Mismatch?

- Common symptoms include illumination of the check engine light, poor engine performance, and potential transmission shifting issues.

2. What are the possible causes of OBDII code C1582 in a Lexus vehicle?

- The code may be triggered due to a mismatch between the assist map number stored in the ECU and the actual assist map number.

3. How can I troubleshoot OBDII code C1582 in my Lexus?

- It is recommended to first check for any loose or damaged electrical connections related to the assist map sensor. Resetting the ECU may also help clear the code.

4. Can a DIYer repair OBDII code C1582 in a Lexus?

- While some basic troubleshooting steps can be performed by DIYers, resolving the root cause of the code may require specialized diagnostic equipment and expertise.

5. Is it safe to continue driving with OBDII code C1582 illuminated in a Lexus?

- It is advisable to address the underlying issue causing the code as soon as possible to prevent potential damage to the vehicle's engine or transmission.

6. How much does it typically cost to repair OBDII code C1582 in a Lexus?

- Repair costs can vary depending on the exact cause of the code and labor rates in your area. It is recommended to obtain quotes from reputable mechanics or dealerships.

7. Can a faulty assist map sensor trigger OBDII code C1582 in a Lexus?

- Yes, a malfunctioning assist map sensor can be a common culprit behind the Assist Map Number Mismatch code in Lexus vehicles.

8. Are there any recalls or technical service bulletins related to OBDII code C1582 in Lexus vehicles?

- It is advisable to check with your local Lexus dealership or visit the manufacturer's website to see if there are any relevant recalls or bulletins for this specific code.

9. Will resetting the ECU clear OBDII code C1582 in a Lexus?

- Resetting the ECU may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle for some time.

10. Can extreme weather conditions affect the occurrence of OBDII code C1582 in a Lexus?

- Extreme temperatures or humidity levels may impact the performance of sensors and electronic components, potentially leading to the triggering of code C1582 in a Lexus.