Trouble code P0334 means:Knock sensor 2 circuit intermittent
Trouble code P1545 means: Throttle Position Control Malfunction
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
Trouble code P0334 means: Knock Sensor 2 Circuit Intermittent (Bank 2)
Trouble code P1545 means: Throttle Position Control Malfunction
Evaporative Emission System Incorrect Purge Flow
Trouble code P0117 means: Engine Coolant Temperature Circuit Low Input
Trouble code P1613 means: MIL Call-UP Circuit Open Or Short To B+
A Volkswagen Passat radio code can be found at any authorized VW dealership or service manual. If the code is incorrect the radio will not turn on.
The only way to know for certain is to read the diagnostic code. Code readers are becomming quite inexpensive and in my opinion, everyone should have one.
you will need to leave the radio on for 1 hour so the radio can reset itself then you can re-enter the code.
jg
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.