So I've had my Pr5 for a few years now and it hasn't given me too much trouble at all, especially for it's mileage. I got these codes today. 0171 is the MAF sensor that I replaced, from autozone, which I feel may have been a mistake. I don't have the tools to turn off the engine light, to see if it gets thrown again. Has anyone dealt with this similar situation? Especially with the vtcs circuit low input?