AutoCodes – GMC – B2118 GMC

B2118 GMC 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 GMC 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 574

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

What does this mean?

What are the Possible Causes of the DTC B2118 GMC?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2118 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 B2118 GMC Code

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

- Common symptoms include erratic power seat movement, failure of seat memory functions, and warning lights on the dashboard.

2. What are the possible causes of OBDII code B2118 GMC?

- The code B2118 GMC can be triggered by a faulty power seat position sensor, wiring issues, or a malfunctioning power seat control module.

3. How can I diagnose the Power Seat Position Sensor Voltage issue related to code B2118 GMC?

- Diagnosis involves checking the wiring connections, testing the power seat position sensor voltage, and using a scan tool to retrieve the trouble codes.

4. Can I repair the Power Seat Position Sensor Voltage problem myself?

- Depending on your skill level and access to tools, you may be able to repair the issue yourself by replacing the faulty sensor, repairing damaged wiring, or resetting the power seat control module.

5. Is it safe to drive with OBDII code B2118 GMC active?

- It is generally safe to drive with this code, but it is advisable to address the issue promptly to avoid potential discomfort or inconvenience caused by a malfunctioning power seat.

6. How much does it cost to fix OBDII code B2118 GMC related to the Power Seat Position Sensor Voltage?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic services.

7. Can a low vehicle battery voltage trigger OBDII code B2118 GMC?

- Yes, a low vehicle battery voltage can sometimes trigger this code due to insufficient power supply to the power seat position sensor.

8. Will resetting the OBDII codes clear B2118 GMC related to the Power Seat Position Sensor Voltage?

- Resetting the codes may temporarily clear the warning lights, but it is important to address the root cause of the issue to prevent the code from reappearing.

9. Are there any preventive maintenance tips to avoid encountering OBDII code B2118 GMC?

- Regularly checking the functionality of your power seat, inspecting wiring for damage, and keeping the vehicle battery in good condition can help prevent this code from appearing.

10. Can a malfunctioning power seat position sensor affect other vehicle systems?

- A malfunctioning power seat position sensor can potentially affect the operation of other electronic systems in the vehicle, such as the seatbelt warning system or airbag deployment.