> As another example, I had a check engine light on my car. It was ~$500 to check the code fault and replace a sensor. You can get OBD2 readers for not very mu

> As another example, I had a check engine light on my car. It was ~$500 to check the code fault and replace a sensor. You can get OBD2 readers for not very much money (<$20), which would have let you read the code.