OBD1 ECU H1C1 Replacement

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This aftermarket replacement part is used to repair OBD1 Honda/Acura ECUs with CEL codes 4, 8, and 9. If you've replaced distributors and still have a CEL, this is probably your so lution. H1C1 converts variable reluctance (AC) signals from your distributor to digital square waves that the microcontroller in the ECU can process. The original circuit board at H1C1 is not available on the market. This aftermarket replacement is now available to use in its place. Installation instructions Show more