Bad pressure regulator symptoms that you could be experiencing are a no start, hard start, rough idle, a check engine light, fuel in the fuel pressure regulator vacuum line, failed emissions test, poor engine performance, and poor gas mileage. Some of the engine codes you might retrieve are P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0172.

This article will help you see if it's time to replace the AC pressure switch in your car. The 4 symptoms of a bad AC pressure switch that you may experience are an engine light with codes (P0530, P0531, P0532, and P0533), the AC compressor not turning on, AC blowing warm air, and AC not working consistently.

Having starter issues? This article will help you learn 5 BAD STARTER symptoms. Some of the signs of a bad starter may be a grinding noise while cranking, no crank, no start, slow crank, one-click sound, and your starter running but not the engine.

This article will help you learn 5 bad spark plug symptoms and trouble codes. Bad spark plugs symptoms that you may experience are an engine light with P0300-P0312 codes, rough idle, poor gas mileage, lack of acceleration, and slow crank but no start.