Bad line means the wiring or control board received a power surge. The display will flash bad line and also beep annoyling loud until the oven is shut off. Flipping the circuit breaker may clear the problem, but to be extra safe have an electrician check it out.
bad code read again know such code
Chiken little
Depends on the type of fault. A circuit code could mean the valve is bad. A performance code could mean that the hoses and lines going form the tank to the engine could be cracked.
Camshaft position sensor is bad
Code 14 Idle air control valve or bad ECM
Vss is bad
Bad Vtech solenoid
Bad O2 sensor-no activity detected.
A leaky or faulty microwave oven can be dangerous, but there's no proven risk to a functioning one.
I believe 0421 is a catalytic converter inefficiency code which is usually caused by a bad o2 sensor or a bad catalytic converter, but I have also seen fouled plugs and exhaust leaks cause this code.
Bad throttle position sensor
It probably means something bad...