Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Replace and Program ECU or Reprogram ECU
2018 Buick Regal BaseSECTION Replace and Program ECU or Reprogram ECU
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
To program a replacement or an existing ECU, perform the following procedure:
NOTE:
- Due to continuous improvements, the on screen selections may vary from instructions below.
- It is recommended to program both the left and right (if programmable) when a programming event is required.
- Some systems only have one programmable Side Object Sensor Module.
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- On the SPS Supported Controllers screen, select B218L/R Side Object Sensor Module or B218R Right Side Object Sensor Module or B218L Left Side Object Detection.
- On the SPS Select Function/Sequence screen, select Sequential Programming or Programming
- Clear DTCs.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.