But he said 12 12 12 , meaning he is reading the flashes. IE jumpered and no scanner.
When you jumper to check codes it always flashes code 12. What you need is a scan tool/cable/laptop. if the Check Engine Light is on when running you have a problem. You would need to scan it to see the code as it is there and not setting for whatever reason. if it is flashing fast and NOT jumpered while key on, you have a bad chip or ECM.
But don't dyno with the light on, depending on the code it may be in "limp home mode" may hurt the engine, but won't give you good dyno results.
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