AutoCodes – Cadillac – B0090 Cadillac

B0090 Cadillac Code - Rollover Sensor Erratic

Quick Answer

The Inflatable Restraint Vehicle Rollover Sensor (ROS) utilizes battery power supply and a bidirectional interface circuit. Common causes include Faulty Rollover Sensor, Rollover Sensor harness is open or shorted, Rollover 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: B0090 Cadillac indicates Rollover Sensor Erratic.
Common causes: Common causes include Faulty Rollover Sensor, Rollover Sensor harness is open or shorted, Rollover 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 2,742

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0090 Cadillac Description

The Inflatable Restraint Vehicle Rollover Sensor (ROS) utilizes battery power supply and a bidirectional interface circuit. The ROS modulates current on the interface to send ID, State of Health, and deployment commands to the Inflatable Restraint Sensing and Diagnostic Module (SDM). When the ignition is turned on the ROS responds by performing internal diagnostics and sending an ID to the SDM. The ROS continually communicates status messages to the SDM, which determines if a fault is present in the ROS circuit. If the fault is present, the SDM will set a Diagnostic Trouble Code (DTC).

OBDII Code B0090 Cadillac - Rollover Sensor Erratic - AutoCodes.com — B0090 Cadillac Code - Rollover Sensor Erratic

What does this mean?

What are the Possible Causes of the DTC B0090 Cadillac?

Faulty Rollover Sensor
Rollover Sensor harness is open or shorted
Rollover Sensor circuit poor electrical connection
Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0090 Cadillac?

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 does this mean?

Code Tech Notes

DTC B0090 00 Rollover Sensor No Additional Information
DTC B0090 0F Rollover Sensor Erratic
DTC B0090 3A Rollover Sensor Incorrect Component Installed
DTC B0090 39 Rollover Sensor Internal Electronic Failure
DTC B0090 71 Rollover Sensor Invalid Serial Data Received

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0090 Cadillac 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 B0090 Cadillac code?

Need more information on how to fix the B0090 Cadillac code? Get Access to Factory Service Manuals

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Get the B0090 Cadillac code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B0090 Cadillac Code

1. What are the common symptoms of OBDII code B0090 Cadillac (Rollover Sensor Erratic)?

The common symptoms include the airbag warning light illuminating on the dashboard, potential deployment issues with the airbags, and possible disabling of the airbag system.

2. What causes the OBDII code B0090 Cadillac (Rollover Sensor Erratic) to trigger?

This code is typically triggered by a malfunction in the rollover sensor, which is responsible for detecting a vehicle rollover and deploying the airbags accordingly.

3. How can I diagnose the cause of OBDII code B0090 Cadillac (Rollover Sensor Erratic)?

Diagnosing this code usually involves conducting a thorough inspection of the rollover sensor, checking the wiring and connections for any damage, and using a diagnostic scan tool to retrieve specific fault codes.

4. Is it safe to drive with OBDII code B0090 Cadillac (Rollover Sensor Erratic) active?

It is not recommended to drive with this code active, as it may compromise the proper functioning of the airbag system, potentially putting you at risk in the event of an accident.

5. Can I reset the OBDII code B0090 Cadillac (Rollover Sensor Erratic) on my own?

While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

6. What are some repair tips for fixing OBDII code B0090 Cadillac (Rollover Sensor Erratic)?

Repair tips may include checking and repairing any damaged wiring, replacing the rollover sensor if necessary, and ensuring all connections are secure and functioning properly.

7. Can a DIY enthusiast fix OBDII code B0090 Cadillac (Rollover Sensor Erratic) at home?

Depending on your level of expertise and access to tools, you may be able to address this issue at home. However, it is recommended to seek professional help for accurate diagnosis and repair.

8. How much does it cost to repair OBDII code B0090 Cadillac (Rollover Sensor Erratic)?

The cost of repairs for this code can vary depending on the extent of the issue, the parts needed for replacement, and labor costs. It is advisable to obtain quotes from different mechanics or dealerships.

9. Are there any recalls or technical service bulletins related to OBDII code B0090 Cadillac (Rollover Sensor Erratic)?

It is advisable to check with your local Cadillac dealership or visit the manufacturer's website to inquire about any recalls or technical service bulletins related to this specific OBDII code.

10. How can regular maintenance help prevent OBDII code B0090 Cadillac (Rollover Sensor Erratic) from occurring?

Regular maintenance, including checking the airbag system components during routine inspections, can help prevent issues like the rollover sensor malfunction that triggers this OBDII code.