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.
ECM/PCM Reset
2008 Honda Civic Si, 4D SedanSECTION ECM/PCM Reset
WARNING: This page is about a different variant/trim than selected.
- Reset the ECM/PCM with the HDS while the engine is stopped.
- Turn the ignition switch to LOCK (0).
- Turn the ignition switch to ON (II), and wait 30 seconds.
- Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.
- Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
RENDER: 1.0x
NO RELATED
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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.