AutoCodes – Buick – P1762 Buick

P1762 Buick Code - Transmission Mode Switch Signal Message

Quick Answer

The Body Control Module (BCM) is constantly sending the Engine Control Module (ECM) and Transmission Control Module (TCM) serial data messages with information regarding transmission mode switch activation. Common causes include Faulty Transmission Control Module (TCM), Faulty Body Control Module (BCM). 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: P1762 Buick indicates Transmission Mode Switch Signal Message.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Faulty Body Control Module (BCM).
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 558

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 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1762 Buick Description

The Body Control Module (BCM) is constantly sending the Engine Control Module (ECM) and Transmission Control Module (TCM) serial data messages with information regarding transmission mode switch activation. The TCM sets this code when it detects a discrepancy in the structure of the message causing the signal message integrity to be questioned. The Diagnostic Trouble Code (DTC) is set when the TCM detects an error in the rolling count value that does not match with the BCM.

OBDII Code P1762 Buick - Transmission Mode Switch Signal Message - AutoCodes.com — P1762 Buick Code - Transmission Mode Switch Signal Message

What does this mean?

What are the Possible Causes of the DTC P1762 Buick?

Faulty Transmission Control Module (TCM)
Faulty Body Control Module (BCM)

How to Fix the DTC P1762 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 P1762 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 P1762 Buick Code

1. What are the common symptoms of OBDII code P1762 in a Buick related to the Transmission Mode Switch Signal Message?

The common symptoms include issues with shifting gears, delayed engagement, transmission slipping, and the transmission being stuck in a single gear.

2. What are some possible causes of the OBDII code P1762 in a Buick?

Possible causes include a faulty transmission mode switch, wiring issues in the transmission mode switch circuit, or a problem with the transmission control module.

3. How can I diagnose the OBDII code P1762 in my Buick?

Diagnosis involves using a scan tool to read the code, checking the transmission mode switch for proper operation, inspecting the wiring for any damage or loose connections, and testing the transmission control module.

4. Is it safe to continue driving my Buick with the OBDII code P1762 present?

It is not recommended to continue driving your vehicle with this code present, as it can lead to further damage to the transmission and potentially unsafe driving conditions.

5. Can I repair the OBDII code P1762 in my Buick myself?

Depending on your level of automotive knowledge and experience, you may be able to repair this issue yourself by replacing the transmission mode switch, repairing any damaged wiring, or resetting the transmission control module.

6. How much does it typically cost to repair the OBDII code P1762 in a Buick at a professional repair shop?

The cost of repair can vary depending on the exact cause of the code and the labor rates of the repair shop, but it can range from a few hundred to over a thousand dollars.

7. Will resetting the OBDII code P1762 in my Buick make the issue go away?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to return and the symptoms may persist.

8. Can a faulty transmission mode switch cause other transmission-related issues in my Buick?

Yes, a faulty transmission mode switch can cause a range of transmission-related issues beyond just triggering the OBDII code P1762, so it is important to address this issue promptly.

9. Is the OBDII code P1762 common in Buick vehicles, or is it a rare occurrence?

While it may not be as common as some other OBDII codes, the P1762 code related to the Transmission Mode Switch Signal Message can still occur in Buick vehicles, particularly in older models or those with high mileage.

10. How can I prevent the OBDII code P1762 from appearing in my Buick in the future?

Regular maintenance and inspections of your transmission system, including the transmission mode switch and related wiring, can help prevent the recurrence of the P1762 code in your Buick.