B1159 Chevrolet Code - SDM Calibration Mismatch
Quick Answer
The B1159 code for Chevrolet vehicles indicates a "SDM Calibration Mismatch" error. Common causes include Faulty SDM unit, Sensor calibration issues, Wiring or connection issues in the SRS system. 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
- B1159 Chevrolet indicates SDM Calibration Mismatch.
- Common causes
- Common causes include Faulty SDM unit, Sensor calibration issues, Wiring or connection issues in the SRS system.
- 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 B1159 Chevrolet Description
The B1159 code for Chevrolet vehicles indicates a "SDM Calibration Mismatch" error. The Supplemental Restraint System (SRS) in modern vehicles is a crucial safety feature that includes airbags and seatbelt pre-tensioners. The SDM (Sensing and Diagnostic Module) is a key component of the SRS that monitors various sensors to deploy airbags and other safety measures in the event of a crash.
Common Causes of B1159 Chevrolet
- Faulty SDM unit
- Sensor calibration issues
- Wiring or connection issues in the SRS system
- Impact or collision that may have affected the SRS components
- Software glitches or malfunctions in the SDM
Symptoms of B1159 Chevrolet
- Airbag warning light illuminated on the dashboard
- Inconsistent or delayed deployment of airbags
- Seatbelt pre-tensioners not activating properly
- Diagnostic trouble codes related to the SRS system
How to Fix B1159 Chevrolet
- Connect a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific trouble codes and confirm the B1159 code.
- Inspect the wiring and connections in the SRS system to ensure there are no loose connections or damage.
- Check the sensors and SDM unit for any signs of damage or malfunction and replace if necessary.
- Perform a calibration procedure on the SDM to ensure that the data matches the actual sensor readings.
- Clear the trouble codes and perform a test drive to verify that the issue has been resolved and the airbags deploy correctly.
Cost to Fix B1159 Chevrolet
The cost of repairing a B1159 code for Chevrolet vehicles can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor to address this problem. However, it is important to note that prices may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive rates. It is recommended to obtain quotes from multiple auto repair shops to ensure you are getting a fair price for the necessary repair.
Tech Notes for B1159 Chevrolet
If DTCs B1155 and B1159 are set, SDM is receiving the wrong message from Standard Body Module (SBM).
If DTCs B1155 and B1160 are set, SDM is receiving the wrong message from Powertrain Control Module (PCM).
If DTC B1159 sets alone, SDM did not receive a message from SBM.
If DTC B1160 sets alone, SDM did not receive a message from PCM.
If DTCs B1159 and B1160 are set without DTC B1155, SDM did not receive messages from SBM or PCM.
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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 B1159 Chevrolet Code
1. What are the common symptoms of OBDII code B1159 Chevrolet (SDM Calibration Mismatch)?
- Common symptoms include the airbag warning light staying illuminated on the dashboard and potential issues with the vehicle's airbag system.
2. What does the OBDII code B1159 Chevrolet (SDM Calibration Mismatch) indicate?
- This code indicates a mismatch between the calibration of the Sensing and Diagnostic Module (SDM) and the rest of the airbag system in the vehicle.
3. What are the possible causes of the SDM Calibration Mismatch (B1159) code?
- The code can be triggered by a disconnected, damaged, or faulty SDM, issues with the airbag sensors, wiring problems, or a recent collision that affected the airbag system.
4. Can driving with the B1159 Chevrolet code (SDM Calibration Mismatch) pose any risks?
- Driving with this code unresolved can pose a safety risk as the airbag system may not deploy correctly in the event of a collision.
5. How can I diagnose and repair the B1159 Chevrolet code (SDM Calibration Mismatch) issue?
- Diagnosing and repairing this code typically requires specialized diagnostic tools to pinpoint the exact cause, followed by repairing or replacing the faulty SDM or addressing any wiring issues.
6. Is it safe to reset the B1159 Chevrolet code (SDM Calibration Mismatch) without fixing the underlying issue?
- It is not recommended to simply reset the code without addressing the underlying problem, as this may compromise the functionality of the airbag system.
7. Are there any DIY tips for troubleshooting the B1159 Chevrolet code (SDM Calibration Mismatch)?
- DIY troubleshooting tips include checking the airbag system's connections, inspecting the SDM for any visible damage, and ensuring all wiring related to the airbag system is intact.
8. How can a professional mechanic help in resolving the B1159 Chevrolet code (SDM Calibration Mismatch)?
- A professional mechanic can conduct in-depth diagnostics using specialized tools, accurately identify the root cause of the issue, and perform the necessary repairs or replacements to fix the problem.
9. Can the B1159 Chevrolet code (SDM Calibration Mismatch) be intermittent or permanent?
- The code can sometimes be intermittent, especially if the issue is related to loose connections or intermittent faults, but it is crucial to address it promptly to ensure the airbag system's proper functioning.
10. Is it necessary to have the B1159 Chevrolet code (SDM Calibration Mismatch) fixed immediately?
- Yes, it is recommended to address this code promptly to ensure the proper functioning of the airbag system and maintain the safety of the vehicle occupants in the event of a collision.
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