AutoCodes – Saturn – B1850 Saturn

B1850 Saturn Code - Driver Seat Lumbar Position Sensor Circuit

Quick Answer

The Driver Seat Module (DSM) monitors the positions of most of the seat adjuster motors using hall effect type position sensors. Common causes include Faulty Driver Seat Lumbar Position Sensor, Driver Seat Lumbar Position Sensor harness is open or shorted, Driver Seat Lumbar 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: B1850 Saturn indicates Driver Seat Lumbar Position Sensor Circuit.
Common causes: Common causes include Faulty Driver Seat Lumbar Position Sensor, Driver Seat Lumbar Position Sensor harness is open or shorted, Driver Seat Lumbar 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 692

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 Jul 31, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1850 Saturn Description

The Driver Seat Module (DSM) monitors the positions of most of the seat adjuster motors using hall effect type position sensors. The hall effect position sensors are supplied with battery positive reference and ground circuits from the DSM. The position sensor signal circuits are supplied battery positive voltage through a resistor then monitored within the DSM. During adjuster motor operation the hall effect position sensor provides a single pulse for every adjuster motor shaft rotation. The DSM counts the pulses from the position sensor signal circuits to determine the adjuster motor positions when storing or recalling memory seat position settings.

OBDII Code B1850 Saturn - Driver Seat Lumbar Position Sensor Circuit - AutoCodes.com — B1850 Saturn Code - Driver Seat Lumbar Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B1850 Saturn?

Faulty Driver Seat Lumbar Position Sensor
Driver Seat Lumbar Position Sensor harness is open or shorted
Driver Seat Lumbar Position Sensor circuit poor electrical connection
Faulty Driver Seat Module (DSM)

How to Fix the DTC B1850 Saturn?

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 B1850 Saturn 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.

Need more information about the B1850 Saturn code?

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Need Help with the Code?

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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 B1850 Saturn Code

1. What are the common symptoms of OBDII code B1850 in a Saturn related to the Driver Seat Lumbar Position Sensor Circuit?

The common symptoms include the driver seat lumbar support not adjusting properly or being stuck in one position, and the seat adjustment controls not responding.

2. What usually causes the OBDII code B1850 in a Saturn related to the Driver Seat Lumbar Position Sensor Circuit?

The code is typically triggered by a malfunction in the driver seat lumbar position sensor circuit, which can be caused by wiring issues, sensor failure, or a faulty control module.

3. How can I diagnose the OBDII code B1850 in my Saturn for the Driver Seat Lumbar Position Sensor Circuit?

Diagnosing the issue involves checking the wiring connections, testing the sensor for proper operation, and using a scan tool to read the trouble codes stored in the vehicle's computer system.

4. Can I repair the OBDII code B1850 related to the Driver Seat Lumbar Position Sensor Circuit in my Saturn myself?

Depending on your skill level and access to tools, you may be able to repair the issue yourself by fixing wiring problems, replacing the sensor, or reprogramming the control module. However, consulting a professional mechanic is recommended for complex repairs.

5. Are there any simple troubleshooting tips I can try before seeking professional help for the OBDII code B1850 in my Saturn?

You can start by checking the fuse related to the seat lumbar support system, ensuring all seat adjustment controls are functioning properly, and inspecting the wiring harness for any visible damage or loose connections.

6. Is it safe to continue driving my Saturn with the OBDII code B1850 related to the Driver Seat Lumbar Position Sensor Circuit?

While the vehicle may still be operable, it is recommended to address the issue promptly to avoid potential discomfort and loss of proper seat adjustment while driving.

7. How much does it typically cost to repair the OBDII code B1850 for the Driver Seat Lumbar Position Sensor Circuit in a Saturn at a dealership or repair shop?

The cost of repair can vary depending on the exact cause of the issue, but it may involve labor charges for diagnosis and repair, as well as the cost of any replacement parts needed.

8. Will resetting the OBDII code B1850 related to the Driver Seat Lumbar Position Sensor Circuit make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the fault again.

9. Can extreme temperatures or moisture affect the operation of the Driver Seat Lumbar Position Sensor Circuit in a Saturn and trigger the OBDII code B1850?

Yes, extreme temperatures or moisture can potentially cause electrical issues in the sensor circuit, leading to malfunctions and triggering the OBDII code B1850 in the Saturn.

10. How long does it usually take to repair the OBDII code B1850 for the Driver Seat Lumbar Position Sensor Circuit in a Saturn?

The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take anywhere from a few hours to a full day to diagnose and fix the problem.