AutoCodes – Buick – B2118 Buick

B2118 Buick Code - Power Seat Position Sensor Voltage

Quick Answer

The Power Seat Position Sensor that sets this Diagnostic Trouble Code (DTC) is either attached to the seat directional motor drive cable or directly to the motor it monitors. Common causes include Faulty Power Seat Position Sensor, Power Seat Position Sensor harness is open or shorted, Power Seat Position Sensor 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: B2118 Buick indicates Power Seat Position Sensor Voltage.
Common causes: Common causes include Faulty Power Seat Position Sensor, Power Seat Position Sensor harness is open or shorted, Power Seat Position Sensor 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 751

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 Sep 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2118 Buick Description

The Power Seat Position Sensor that sets this Diagnostic Trouble Code (DTC) is either attached to the seat directional motor drive cable or directly to the motor it monitors. It receives a 5 V reference and ground from the Memory Seat Module (MSM). The sensor sends a voltage signal that varies with the movement of the seat through the signal circuit to the MSM. Then based on this voltage signal, the MSM determines the position of the seat. If the MSM sees the analog input from this sensor as either lower than 0.25 V or higher than 4.75 V, the sensor will be considered out of range and the MSM will set this DTC.

OBDII Code B2118 Buick - Power Seat Position Sensor Voltage - AutoCodes.com — B2118 Buick Code - Power Seat Position Sensor Voltage

What does this mean?

What are the Possible Causes of the DTC B2118 Buick?

Faulty Power Seat Position Sensor
Power Seat Position Sensor harness is open or shorted
Power Seat Position Sensor circuit poor electrical connection
Faulty Memory Seat Module (MSM)

How to Fix the DTC B2118 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 B2118 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 B2118 Buick Code

1. What are the common symptoms of OBDII code B2118 in a Buick related to the Power Seat Position Sensor Voltage?

The common symptoms include malfunctioning power seat adjustments, erratic movement of the power seat, or complete loss of power seat functionality.

2. What are the possible causes of OBDII code B2118 in a Buick?

The code B2118 may be triggered by a faulty power seat position sensor, damaged wiring or connectors in the power seat system, or a malfunctioning power seat control module.

3. How can I diagnose the issue related to OBDII code B2118 in my Buick?

Diagnosing the issue involves checking the wiring and connectors for any damage, testing the power seat position sensor for proper voltage output, and scanning the power seat control module for error codes.

4. Can I repair OBDII code B2118 in my Buick at home?

If you have experience working with automotive electrical systems, you may be able to repair the issue at home by replacing the faulty power seat position sensor or repairing any damaged wiring.

5. Is it safe to drive my Buick with OBDII code B2118 related to the Power Seat Position Sensor Voltage?

It is not recommended to drive the vehicle with a malfunctioning power seat position sensor, as it can affect the proper operation of the power seat and compromise driver comfort and control.

6. How much does it typically cost to repair OBDII code B2118 in a Buick at a professional auto repair shop?

The cost of repairing OBDII code B2118 can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor at a professional auto repair shop.

7. Can resetting the OBDII code B2118 in my Buick fix the issue temporarily?

Resetting the code may temporarily clear the error from the system, but if the underlying issue with the power seat position sensor voltage is not addressed, the code is likely to reappear.

8. Will OBDII code B2118 cause my Buick to fail an emissions test?

OBDII code B2118 is not directly related to emissions, so it should not cause your Buick to fail an emissions test. However, it is still important to address the issue for proper vehicle functionality.

9. How important is it to fix OBDII code B2118 in a Buick promptly?

It is important to address OBDII code B2118 promptly to ensure the proper functioning of the power seat system in your Buick and maintain driver comfort and control while operating the vehicle.

10. Can a power seat position sensor issue trigger other error codes in my Buick's OBDII system?

A faulty power seat position sensor can potentially trigger other error codes related to the power seat system or electrical issues, so it is important to diagnose and repair the problem promptly.