B172F 2018 GMC Sierra Code - Driver Seat Cushion Right 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 Right Rear Haptic Movement Motor, Driver Seat Cushion Right Rear Haptic Movement Motor harness is open or shorted, Drivers Seat Cushion Right 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
- B172F 2018 GMC Sierra indicates Driver Seat Cushion Right Rear Haptic Movement.
- Common causes
- Common causes include Faulty Driver Seat Cushion Right Rear Haptic Movement Motor, Driver Seat Cushion Right Rear Haptic Movement Motor harness is open or shorted, Drivers Seat Cushion Right 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 B172F 2018 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 B172F 2018 GMC Sierra?
- Faulty Driver Seat Cushion Right Rear Haptic Movement Motor
- Driver Seat Cushion Right Rear Haptic Movement Motor harness is open or shorted
- Drivers Seat Cushion Right Rear Haptic Movement Motor circuit poor electrical connection
- Faulty Seat Memory Control Module
How to Fix the DTC B172F 2018 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 B172F 2018 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 B172F 2018 GMC Sierra Code
1. What does the OBDII code B172F mean on a 2018 GMC Sierra?
B172F indicates an issue with the driver seat cushion's right rear haptic movement, typically related to the vibration motor or its circuit.
2. What are the symptoms of code B172F in a 2018 GMC Sierra?
Common symptoms include the driver seat not vibrating during alerts, reduced functionality of safety features like lane departure warnings, or no noticeable movement from the seat cushion.
3. What causes the B172F code on a GMC Sierra?
Potential causes include a faulty haptic motor, damaged wiring, loose connectors, or an issue with the control module managing the seat's vibration feature.
4. Can I still drive my 2018 GMC Sierra with a B172F code?
Yes, the vehicle is still drivable, but the safety alert system's effectiveness may be reduced due to the non-functional seat vibration feature.
5. How do I troubleshoot the B172F code on my GMC Sierra?
Start by checking the wiring and connectors under the seat, ensuring they are secure and undamaged. If no issues are found, test the haptic motor or consult a professional.
6. How much does it cost to fix a B172F code issue?
Repair costs vary depending on the issue. Replacing a haptic motor may cost $200–$500, while wiring repairs or diagnostics may range from $100–$200.
7. Can a loose connector trigger the B172F code?
Yes, a loose or corroded connector can disrupt the signal to the haptic motor and trigger the B172F code.
8. Do I need to replace the entire seat if I get a B172F code?
No, in most cases, only the haptic motor or related components need replacement, not the entire seat.
9. Will clearing the B172F code fix the problem?
Clearing the code may temporarily remove it, but if the underlying issue is not resolved, the code will likely reappear.
10. Is the B172F code covered under warranty for a 2018 GMC Sierra?
It depends on your warranty coverage. If your vehicle is still under the bumper-to-bumper or seat system warranty, repairs may be covered.
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