AutoCodes – Buick – B1973 Buick

B1973 Buick Code - High Power Control Fault

Quick Answer

Battery guard relay supplies power to modules during controlled power usage. Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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: B1973 Buick indicates High Power Control Fault.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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 568

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 Aug 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1973 Buick Description

Battery guard relay supplies power to modules during controlled power usage. For 15 minutes after the ignition is turned to the LOCK position and Body Control Module (BCM) is awake, the battery guard relay output coil is grounded at the terminal of BCM. After 15 minutes, low power driver output is turned on.
The Diagnostic Trouble Code (DTC) B1973 will set when BCM detects a short to battery voltage in the battery guard relay output circuit for more than 2 seconds. When DTC B1973 is set, BCM will turn low power control output off if ignition is in LOCK position. DTC B1973 will clear when conditions for fault no longer exist or when scan tool is used. A history DTC will clear after 50 consecutive ignition cycles if conditions for fault no longer exist.

OBDII Code B1973 Buick - High Power Control Fault - AutoCodes.com — B1973 Buick Code - High Power Control Fault

What does this mean?

What are the Possible Causes of the DTC B1973 Buick?

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

How to Fix the DTC B1973 Buick?

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 B1973 Buick 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 B1973 Buick Code

1. What are the common symptoms of OBDII code B1973 Buick (High Power Control Fault)?

- Common symptoms include issues with power steering, power brakes, and other power-related systems in the vehicle.

2. What can cause the OBDII code B1973 Buick to trigger?

- The code may trigger due to a faulty high power control module, damaged wiring harness, or a malfunction within the power control system.

3. How can I diagnose the OBDII code B1973 Buick at home?

- You can use an OBDII scanner to read the code and further diagnose the issue by checking the power control module, wiring connections, and related components.

4. Is it safe to drive with the OBDII code B1973 Buick active?

- It is not recommended to drive the vehicle with this code active, as it can affect the performance and safety of power-assisted systems.

5. What are some possible repair tips for fixing the OBDII code B1973 Buick?

- Repair tips may include checking and repairing any damaged wiring, replacing the high power control module, and ensuring proper connections are secure.

6. Can a DIY enthusiast fix the OBDII code B1973 Buick, or is it better left to professionals?

- Depending on the extent of the issue, DIY enthusiasts with automotive repair experience may be able to address the problem, but complex issues may require professional assistance.

7. How much does it typically cost to repair the OBDII code B1973 Buick?

- The cost of repair can vary based on the cause of the issue, parts needed, and labor costs. It is advisable to obtain quotes from different repair shops.

8. Are there any preventive measures to avoid the OBDII code B1973 Buick in the future?

- Regular maintenance checks, including inspecting wiring harnesses and power control systems, can help prevent issues that may trigger this code.

9. Can resetting the OBDII system clear the B1973 Buick code temporarily?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

10. How urgent is it to address the OBDII code B1973 Buick once it appears?

- It is recommended to address the issue promptly to prevent further damage to power-assisted systems and ensure the safety and performance of the vehicle.