Civic Si L4-2.0L (2004)
Malfunction Indicator Lamp: Description and Operation
Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
The vehicle has certain "readiness codes" that are part of the on-board diagnostics for the emissions systems. If the vehicle's battery has been
disconnected or gone dead, if the DTCs have been cleared, or if the ECM has been reset, these codes are set to incomplete. In some states, part of the
emissions; testing is to make sure these codes are set to complete. If all of them are not set to complete, the vehicle may fail the test or the test cannot be
finished.
To check if the readiness codes are set to complete, turn the ignition switch ON (II), but do not start the engine. The MIL will come on for 15-20
seconds. If it then goes off, the readiness codes are set to complete. If it blinks several times, on 2 or more readiness codes are not set to complete. To set
each code, drive the vehicle or run the engine as described in the procedures to set them.
