B172E 2018 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 2018 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 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 B172E 2018 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 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 B172E 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 B172E 2018 GMC Sierra Code
1. What does the OBDII code B172E mean on a 2018 GMC Sierra?
The code B172E indicates an issue with the Driver Seat Cushion Left Rear Haptic Movement, which is part of the seat vibration system used for safety alerts.
2. What are common symptoms of code B172E in a GMC Sierra?
Common symptoms include the driver’s seat not vibrating during safety alerts, such as lane departure or collision warnings.
3. What causes the B172E code to appear?
The most common causes are a faulty haptic motor, damaged wiring, or a malfunction in the seat control module.
4. How can I diagnose the issue related to the B172E code?
Diagnosis involves scanning for codes, inspecting the seat wiring and connectors, and testing the haptic motor for proper operation.
5. Can I continue driving with the B172E code active?
Yes, you can continue driving, but the safety alert vibration system may not function, reducing the effectiveness of certain safety features.
6. How do I fix the B172E code in a 2018 GMC Sierra?
Possible fixes include repairing or replacing the haptic motor, repairing damaged wiring, or reprogramming or replacing the seat control module.
7. How much does it cost to repair the B172E code?
Repair costs vary but typically range from $100 to $500, depending on whether components like the haptic motor or seat control module need replacement.
8. Can I fix the B172E issue myself?
If you are comfortable working with automotive wiring and have a diagnostic tool, you can attempt repairs. Otherwise, professional assistance is recommended.
9. Is the B172E code covered under warranty for a 2018 GMC Sierra?
It may be covered if your truck is still under the factory or extended warranty. Check with your dealership for confirmation.
10. How can I prevent the B172E code from recurring?
Preventive measures include keeping the seat wiring and connectors free from damage and ensuring regular system checks during routine maintenance.
Discuss the causes and fixes for B172E 2018 GMC Sierra OBDII Code
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