Have been getting a persistent B1503 for a few weeks now. No other codes, the car seems to function perfectly otherwise. No drop in MPG, no other noticeable ill effects… If I clear DTCs, B1503 comes back up almost immediately upon startup. What order of troubleshooting would y'all recommend?
First of all, I had no idea we could upload an animated profile pic? You've changed my life on Priuschat forever!