What are the ecu codes for 89 civic?

The 1989 Honda Civic typically uses the OBD1 (On-Board Diagnostics) system, which employs a series of diagnostic trouble codes (DTCs) for identifying issues. Common ECU codes for this model can include codes like 1 (O2 sensor), 4 (crankshaft position sensor), and 8 (TDC sensor). To retrieve these codes, you would generally use a jumper wire to connect specific terminals in the service connector and then count the check engine light blinks. Always refer to a Honda service manual for the complete list and accurate diagnostics.