AutoCodes – Generic – B2620

B2620 Code - ECU Power Source Circuit Malfunction

Quick Answer

The Multiplex Tilt and Telescopic ECU power source circuit supplies positive voltage to the multiplex tilt and telescopic ECU. Common causes include Faulty Multiplex Tilt and Telescopic ECU, Multiplex Tilt and Telescopic ECU harness is open or shorted, Multiplex Tilt and Telescopic 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: B2620 indicates ECU Power Source Circuit Malfunction.
Common causes: Common causes include Faulty Multiplex Tilt and Telescopic ECU, Multiplex Tilt and Telescopic ECU harness is open or shorted, Multiplex Tilt and Telescopic 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 6,848

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2620 Description

The Multiplex Tilt and Telescopic ECU power source circuit supplies positive voltage to the multiplex tilt and telescopic ECU. The Diagnostic Trouble Code (DTC) sets when the Multiplex Tilt and Telescopic ECU power source voltage drops to 8 V or less and this condition continues for 10 sec. or more.

OBDII Code B2620 - ECU Power Source Circuit Malfunction - AutoCodes.com — B2620 Code - ECU Power Source Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B2620?

Faulty Multiplex Tilt and Telescopic ECU
Multiplex Tilt and Telescopic ECU harness is open or shorted
Multiplex Tilt and Telescopic ECU circuit poor electrical connection

How to Fix the DTC B2620?

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 B2620 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 B2620 code?

Need more information on how to fix the B2620 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2620 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2620 Buick — Display Dimming Pulse Width Modulation Input Circuit
B2620 Cadillac — Display Dimming Pulse Width Modulation Input Circuit
B2620 Chevrolet — Display Dimming Pulse Width Modulation Input Circuit
B2620 GMC — Display Dimming Pulse Width Modulation Input Circuit
B2620 Lexus — ECU Power Source Circuit Malfunction
B2620 Toyota — ECU Power Source Circuit 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.

Frequently Asked Questions about B2620 Code

1. What are the common symptoms of OBDII code B2620 (ECU Power Source Circuit Malfunction)?

- Common symptoms include engine stalling, difficulty starting the vehicle, and loss of power while driving.

2. What are the possible causes of OBDII code B2620?

- Possible causes include a faulty ECU power source relay, wiring issues, blown fuses, or a malfunctioning ECU.

3. How can I diagnose the ECU Power Source Circuit Malfunction?

- Diagnosis involves checking the ECU power source relay, inspecting the wiring for damage, and testing the fuses related to the ECU power supply.

4. Can a DIY enthusiast repair OBDII code B2620 at home?

- Depending on the root cause, some DIY repairs may be possible, such as replacing a blown fuse or a faulty relay. However, complex issues may require professional diagnosis and repair.

5. What should I do if my vehicle displays the ECU Power Source Circuit Malfunction code?

- It is recommended to have the issue diagnosed and repaired promptly to prevent further damage to the vehicle's ECU and ensure proper functioning of the engine.

6. Can a weak car battery trigger the ECU Power Source Circuit Malfunction code?

- Yes, a weak or failing car battery can sometimes cause voltage fluctuations that may trigger the ECU Power Source Circuit Malfunction code.

7. How much does it typically cost to repair OBDII code B2620?

- The cost of repairs can vary depending on the underlying issue, but it may range from $100 for a simple fix like replacing a blown fuse to several hundred dollars for more complex repairs.

8. Will resetting the OBDII code B2620 make it go away permanently?

- Resetting the code may clear it temporarily, but if the underlying issue is not addressed, the code is likely to reappear once the problem resurfaces.

9. Is driving with the ECU Power Source Circuit Malfunction code safe?

- It is not recommended to drive the vehicle with this code present, as it can lead to potential engine issues and safety hazards on the road.

10. Can a mechanic use a diagnostic tool to troubleshoot OBDII code B2620?

- Yes, a mechanic can use a diagnostic tool to read the code, perform voltage tests, and pinpoint the exact cause of the ECU Power Source Circuit Malfunction for efficient repair.