I have a 2003 Volkswagen Beetle I have codes p0333, p0328, p0420 which is important?

Question

I have a 2003 Volkswagen Beetle 1.4L Turbo I have codes p0333, p0328, p0420 which is important?

Answer 1

You can drive your car without any problems with all three codes present, but you won't be able to pass the smog test with the P0420 and you may loose some engine performance for the knock sensor problem (P0333 and P0328).

P0333 VOLKSWAGEN - Knock Sensor (KS) 2 Circuit High

Read more on Engine-Codes.com: https://www.autocodes.com/p0333_volkswagen.html

P0328 VOLKSWAGEN - Knock Sensor (KS) 1 Circuit High

Read more on Engine-Codes.com: https://www.autocodes.com/p0328_volkswagen.html

P0420 VOLKSWAGEN - Catalyst System Efficiency Below Threshold Bank 1

Read more on Engine-Codes.com: https://www.autocodes.com/p0420_volkswagen.html