AutoCodes – Generic – B1B98

B1B98 Code - Seat Tilt Up Switch Signal Stuck High

Quick Answer

The diagnostic trouble code B1B98 indicates that the seat tilt up switch signal is stuck high, meaning that the signal from the seat control switch is continuously active or engaged. Common causes include Faulty Seat Control Switch, Seat Control Switch harness is open or shorted, Seat Control Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1B98 indicates Seat Tilt Up Switch Signal Stuck High.
Common causes: Common causes include Faulty Seat Control Switch, Seat Control Switch harness is open or shorted, Seat Control Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 20

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 26, 2026

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code B1B98 Description

The diagnostic trouble code B1B98 indicates that the seat tilt up switch signal is stuck high, meaning that the signal from the seat control switch is continuously active or engaged. This condition can arise if the seat control switch is pressed for more than two minutes or if it remains active during the vehicle's self-test routine. The Driver Front Seat Module (DSM) monitors the seat control switch's status, and when it detects that the signal is not returning to its normal state, it triggers this code. This issue can lead to various performance concerns, including the inability to adjust the driver's seat properly, which can affect driver comfort and safety. If ignored, the problem may worsen, potentially leading to further electrical issues within the seat control system or even affecting other related systems in the vehicle. Long-term neglect of this code could result in increased wear on the seat motor or other components, leading to costly repairs down the line. Additionally, the constant engagement of the seat motor could drain the vehicle's battery, especially if the vehicle is not in use for extended periods. Therefore, addressing the B1B98 code promptly is crucial for maintaining both the functionality of the seat adjustment system and the overall electrical health of the vehicle.

OBDII Code B1B98 - Seat Tilt Up Switch Signal Stuck High - AutoCodes.com — B1B98 Code - Seat Tilt Up Switch Signal Stuck High

What does this mean?

What are the Possible Causes of the DTC B1B98?

Faulty Seat Control Switch
Seat Control Switch harness is open or shorted
Seat Control Switch circuit poor electrical connection
Faulty Seat Motor
Faulty Driver Front Seat Module (DSM)

How to Fix the DTC B1B98?

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 B1B98 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 B1B98 code?

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Information for Specific Makes

B1B98 Ford — Seat Tilt Up Switch Signal Stuck High
B1B98 Lincoln — Seat Tilt Up Switch Signal Stuck High

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.