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.
2008 Chevrolet Optra LS, AutomaticFACTORY OEM SERVICE PROCEDURE
ECM-IMA Diesel Injector Replacement (IQA) Programming
- Ignition OFF.
- Record all the IQA codes from the corresponding cylinder from each injector that is being replaced or from all injectors if the ECM was replaced.
- From the scan main menu, select service programming system, then follow the instructions on the screen.
- Enter the 7 digit IQA code (2) from the injector or injectors (1).
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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