B0090 GMC 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 GMC 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.
Code B0090 GMC Description
What are the Possible Causes of the DTC B0090 GMC?
- 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 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.
Code Tech Notes
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 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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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.
Frequently Asked Questions about B0090 GMC Code
1. What are the common symptoms of OBDII code B0090 GMC (Rollover Sensor Erratic)?
- The common symptoms include the airbag warning light being illuminated on the dashboard and a potential loss of communication with the rollover sensor.
2. What could cause the OBDII code B0090 GMC to trigger?
- The code B0090 GMC is typically triggered by a faulty rollover sensor, wiring issues, or a malfunction in the airbag system.
3. How can I diagnose the cause of the OBDII code B0090 GMC?
- Diagnosing the issue involves using a scan tool to retrieve the specific fault code, checking the wiring connections to the rollover sensor, and performing a visual inspection for any signs of damage.
4. Can I continue driving my vehicle with the OBDII code B0090 GMC active?
- It is not recommended to drive the vehicle with an active B0090 code, as it indicates a potential issue with the airbag system that could compromise safety in the event of a rollover.
5. What are some repair tips for fixing the OBDII code B0090 GMC?
- Repair tips include checking and repairing any damaged wiring, resetting the fault codes after fixing the issue, and ensuring proper connection of the rollover sensor.
6. Is it possible to reset the OBDII code B0090 GMC without fixing the underlying issue?
- While you can clear the fault code temporarily, it will likely reappear until the root cause, such as a faulty rollover sensor, is addressed.
7. How much does it typically cost to repair the OBDII code B0090 GMC?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the rollover sensor, repairing wiring, or addressing other related components.
8. Can I fix the OBDII code B0090 GMC myself, or do I need to take it to a mechanic?
- If you have experience with automotive repair and diagnostics, you may be able to address the issue yourself. However, if you are unsure or uncomfortable working on airbag systems, it is best to consult a professional mechanic.
9. Are there any safety concerns associated with the OBDII code B0090 GMC?
- Yes, there are safety concerns as the code relates to the proper functioning of the airbag system, which is crucial for occupant protection in the event of a rollover.
10. How urgent is it to address the OBDII code B0090 GMC once it appears?
- It is important to address the B0090 code promptly to ensure the proper functioning of the airbag system and maintain vehicle safety standards.
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