My engine light is on on my accord h22 swap. is there a way for me to diagnose the problem without bringing it to the shop. this is the second swap on the car the first was done by the shop the second by me. also the v tec not working could this cause the engine light o apear. oil level is correct, checked all connections and sensors. is there a handheld diagnostic comp i can buy that will help with '95 computer? please help