AutoCodes – Generic – B2782

B2782 Code - Power Source Control ECU Malfunction

Quick Answer

The Certification ECU (Smart Key ECU Assembly) has a power source mode switching function. Common causes include Faulty Steering Lock ECU (Steering Lock Actuator Assembly), Steering Lock ECU harness is open or shorted, Steering Lock ECU 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: B2782 indicates Power Source Control ECU Malfunction.
Common causes: Common causes include Faulty Steering Lock ECU (Steering Lock Actuator Assembly), Steering Lock ECU harness is open or shorted, Steering Lock ECU 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 3,174

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 Jan 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code B2782 Description

The Certification ECU (Smart Key ECU Assembly) has a power source mode switching function. This Diagnostic Trouble Code (DTC) is stored when the IGE input (the steering lock motor activation permission signal) sent directly from the Certification ECU (Smart Key ECU Assembly) to the Steering Lock ECU (Steering Lock Actuator Assembly) is determined to be abnormal.

OBDII Code B2782 - Power Source Control ECU Malfunction - AutoCodes.com — B2782 Code - Power Source Control ECU Malfunction

What does this mean?

What are the Possible Causes of the DTC B2782?

Faulty Steering Lock ECU (Steering Lock Actuator Assembly)
Steering Lock ECU harness is open or shorted
Steering Lock ECU circuit poor electrical connection
Faulty Certification ECU (Smart Key ECU Assembly)

How to Fix the DTC B2782?

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 B2782 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 B2782 code?

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Need Help with the Code?

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Information for Specific Makes

B2782 Lexus — Power Source Control ECU Malfunction
B2782 Nissan — Electric Compressor Shunt Signal Offset
B2782 Scion — Power Source Control ECU Malfunction
B2782 Toyota — Power Source Control ECU Malfunction

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.