AutoCodes – Lexus – P1645 Lexus

P1645 Lexus Code - Body Control Module Malfunction

Quick Answer

P1645 Lexus indicates Body Control Module Malfunction. Common causes include Faulty Body Control Module, Body Control Module harness is open or shorted, Body 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: P1645 Lexus indicates Body Control Module Malfunction.
Common causes: Common causes include Faulty Body Control Module, Body Control Module harness is open or shorted, Body 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 4,687

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 Sep 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1645 Lexus Description

OBDII Code P1645 Lexus - Body Control Module Malfunction - AutoCodes.com — P1645 Lexus Code - Body Control Module Malfunction

What does this mean?

What are the Possible Causes of the DTC P1645 Lexus?

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

How to Fix the DTC P1645 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 P1645 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 P1645 Lexus Code

1. What are common symptoms of OBDII code P1645 (Lexus) related to Body Control Module Malfunction?

Common symptoms include issues with power windows, door locks, interior lights, or other body control functions not working properly.

2. What are possible causes of OBDII code P1645 (Lexus) indicating a Body Control Module Malfunction?

Causes may include a faulty body control module, damaged wiring or connectors, or a software issue within the module.

3. How can I diagnose OBDII code P1645 (Lexus) for a Body Control Module Malfunction?

Diagnosis involves using a professional OBDII scanner to read the code and checking the body control module for any visible signs of damage or loose connections.

4. Can I still drive my Lexus with OBDII code P1645 indicating a Body Control Module issue?

It is generally safe to drive, but you may experience inconvenience due to malfunctioning body control functions. It is recommended to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1645 (Lexus) related to a Body Control Module Malfunction?

Try resetting the body control module by disconnecting the car battery for a few minutes. If the issue persists, consult a professional mechanic for further diagnosis and repair.

6. Is it possible to reset OBDII code P1645 (Lexus) for a Body Control Module Malfunction without repairing the issue?

Resetting the code without addressing the underlying problem may temporarily clear the code, but it is likely to reappear until the root cause is fixed.

7. How much does it cost to repair OBDII code P1645 (Lexus) for a Body Control Module Malfunction?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P1645 (Lexus) related to a Body Control Module Malfunction?

While some basic troubleshooting like checking connections can be done by a DIY enthusiast, complex repairs involving the body control module itself are best left to professional mechanics.

9. Are there any recalls or technical service bulletins related to OBDII code P1645 (Lexus) and Body Control Module Malfunction?

It is recommended to check with Lexus dealerships or online resources for any recalls or technical service bulletins specific to your vehicle model and year.

10. How can I prevent OBDII code P1645 (Lexus) from occurring again after repair for a Body Control Module issue?

Regular maintenance, timely repairs of any electrical issues, and avoiding water damage to the body control module can help prevent the recurrence of this code in the future.