B172E 2016 GMC Sierra Code - Driver Seat Cushion Left Rear Haptic Movement
Quick Answer
The safety alert seat provides a vibration in the driver’s seat bottom cushion to alert the driver of a number of concerns. Common causes include Faulty Driver Seat Cushion Left Rear Haptic Movement Motor, Driver Seat Cushion Left Rear Haptic Movement Motor harness is open or shorted, Driver Seat Cushion Left Rear Haptic Movement Motor 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
- B172E 2016 GMC Sierra indicates Driver Seat Cushion Left Rear Haptic Movement.
- Common causes
- Common causes include Faulty Driver Seat Cushion Left Rear Haptic Movement Motor, Driver Seat Cushion Left Rear Haptic Movement Motor harness is open or shorted, Driver Seat Cushion Left Rear Haptic Movement Motor 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.
Code B172E 2016 GMC Sierra Description
The Seat Memory Control Module receives serial data messages from other modules and provides voltage to control the seat haptic movement motors. The Seat Memory Control Module will pulse the left, right, or both motors with the number of pulses requested over serial data. The Seat Memory Control Module monitors the control circuits for open, short to ground, and short to voltage conditions and will set Diagnostic Trouble Code (DTC) if a circuit fault is detected.
The seat haptic movement motor is DC motor located in the driver’s seat bottom cushion. Two seat haptic movement motors are used in the seat bottom cushion, positioned on the left and right side. An offset weight is attached to the motor. When activated, the spinning offset weight creates a vibration felt by the driver through the seat cushion.
Each seat haptic movement motor receives a constant chassis ground. The motor is controlled by the Seat Memory Control Module providing voltage through a dedicated control circuit. When an alert is required, the Seat Memory Control Module will apply voltage, activating the seat haptic movement motor.
What are the Possible Causes of the DTC B172E 2016 GMC Sierra?
- Faulty Driver Seat Cushion Left Rear Haptic Movement Motor
- Driver Seat Cushion Left Rear Haptic Movement Motor harness is open or shorted
- Driver Seat Cushion Left Rear Haptic Movement Motor circuit poor electrical connection
- Faulty Seat Memory Control Module
How to Fix the DTC B172E 2016 GMC Sierra?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B172E 2016 GMC Sierra 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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Frequently Asked Questions about B172E 2016 GMC Sierra Code
1. What does OBDII code B172E mean on a 2016 GMC Sierra?
Code B172E refers to an issue with the Driver Seat Cushion Left Rear Haptic Movement, indicating a malfunction in the vibration motor or circuit used for seat safety alerts.
2. What are the symptoms of code B172E in a 2016 GMC Sierra?
Common symptoms include the driver's seat not vibrating during safety alerts, such as lane departure or parking assist warnings.
3. What causes the B172E code to trigger in a GMC Sierra?
The code can be caused by a faulty haptic motor, wiring issues, poor electrical connections, or a malfunction in the control module.
4. Can I drive my 2016 GMC Sierra with the B172E code active?
Yes, the vehicle is still drivable, but the driver's seat vibration alerts may not function, potentially reducing the effectiveness of certain safety features.
5. How do I diagnose the B172E code on my GMC Sierra?
Start by checking the wiring and connections to the haptic motor under the driver's seat. Use a scan tool to confirm the code and perform further diagnostic tests.
6. How can I fix the B172E code in a 2016 GMC Sierra?
Repairs may include replacing the haptic motor, repairing damaged wiring, or addressing any loose or corroded electrical connections.
7. How much does it cost to repair the B172E code on a GMC Sierra?
Repair costs can vary, but replacing the haptic motor typically ranges from $150 to $400, depending on labor rates and parts availability.
8. Can I reset the B172E code without repairing the issue?
Clearing the code with a scan tool may temporarily reset it, but the underlying issue must be fixed to prevent the code from returning.
9. Is the B172E code a common issue in the 2016 GMC Sierra?
This code is not very common but can occur in vehicles with frequent use of safety alert systems or wear and tear on seat components.
10. Do I need a professional mechanic to fix the B172E code?
While minor issues like loose connections can be fixed by DIY enthusiasts, diagnosing and replacing the haptic motor may require a professional mechanic.
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