AutoCodes – GMC – B097B GMC

B097B GMC Code - Power Mode Start Switch Circuit

Quick Answer

The Ignition Mode Switch has 2 LED's that indicate the vehicle power mode. Common causes include Faulty Ignition Mode Switch, Ignition Mode Switch harness is open or shorted, Ignition Mode Switch 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: B097B GMC indicates Power Mode Start Switch Circuit.
Common causes: Common causes include Faulty Ignition Mode Switch, Ignition Mode Switch harness is open or shorted, Ignition Mode Switch 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 7,003

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 Mar 11, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B097B GMC Description

The Ignition Mode Switch has 2 LED's that indicate the vehicle power mode. When the vehicle is in the off mode, both LED's will be off. Pressing the ignition mode switch button once (without the brake pedal applied), the vehicle enters the accessory mode and the amber LED (ACC) will illuminate. The accessory mode has a 5 minute timeout to reduce battery drain. Pressing the ignition mode switch button a second time (without the brake pedal applied), the vehicle enters the run/start mode (without the engine running) and the green LED (Run/Start) will illuminate. Pressing and holding the push button start switch for at least 5 seconds will place the vehicle in run/start mode (without the vehicle running) and the green LED (Run/Start) will illuminate. With the ignition off (with the brake pedal applied), pressing the ignition mode switch button once, the vehicle will enter run/start mode and the green LED (run/start) will illuminate. This will start the engine. Both LED's have the voltage supplied from the Body Control Module (BCM). The ignition mode switch sends the ignition mode switch status to the Passive Entry Passive Start Module (PEPS) and to the BCM. The PEPS module sends a redundant signal to the BCM with the ignition mode switch status.

OBDII Code B097B GMC - Power Mode Start Switch Circuit - AutoCodes.com — B097B GMC Code - Power Mode Start Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B097B GMC?

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

How to Fix the DTC B097B GMC?

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 does this mean?

Code Tech Notes

B097B 00: Power Mode Start Switch Circuit Malfunction
B097B 02: Power Mode Start Switch Circuit Short to Ground
B097B 04: Power Mode Start Switch Circuit Open
B097B 08: Power Mode Start Switch Circuit Performance - Signal Invalid
B097B 61: Power Mode Start Switch Circuit - Stuck

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B097B GMC 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 B097B GMC Code

1. What are the common symptoms of OBDII code B097B GMC (Power Mode Start Switch Circuit)?

The common symptoms of this code include issues with starting the vehicle, the engine not cranking or starting, and a non-responsive power mode start switch.

2. What are the typical causes of OBDII code B097B GMC?

The typical causes of this code can be a faulty power mode start switch, damaged wiring or connectors in the power mode start switch circuit, or a defective body control module (BCM).

3. How can I diagnose the Power Mode Start Switch Circuit issue related to code B097B GMC?

You can diagnose the issue by checking the power mode start switch for proper operation, inspecting the wiring and connectors for any damage or corrosion, and using a diagnostic scan tool to read the fault codes stored in the BCM.

4. Can a DIY enthusiast repair OBDII code B097B GMC at home?

While some basic troubleshooting steps can be done at home, repairing OBDII code B097B GMC may require advanced diagnostic tools and expertise. It is recommended to seek assistance from a professional mechanic for proper diagnosis and repair.

5. What are some repair tips for fixing OBDII code B097B GMC?

Repair tips for this code may include replacing the power mode start switch if faulty, repairing or replacing any damaged wiring or connectors, and reprogramming the BCM if necessary.

6. Is it safe to continue driving with OBDII code B097B GMC present?

It is not recommended to continue driving with this code present, as it can lead to potential starting issues or other electrical problems with the vehicle. It's best to address the issue promptly to prevent further damage.

7. How much does it typically cost to repair OBDII code B097B GMC?

The cost of repairing this code can vary depending on the exact cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It's best to get a few quotes from different mechanics to compare prices.

8. Can a low battery voltage trigger OBDII code B097B GMC?

Yes, a low battery voltage can potentially trigger this code as it may affect the power supply to the power mode start switch and the BCM. It's important to ensure the battery is in good condition when diagnosing this issue.

9. How long does it typically take to repair OBDII code B097B GMC?

The repair time for this code can vary depending on the complexity of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the Power Mode Start Switch Circuit problem.

10. Can a disconnected power mode start switch cause OBDII code B097B GMC?

Yes, a disconnected or improperly connected power mode start switch can cause this code to be triggered. It's important to check the switch's connection and functionality during the diagnostic process.