A0 pin outputs 4.3V

Using Arduino IDE 1.x
1

I have a code loaded on the arduino Uno for taking analog measurements from two sensors. Everything has been working excellent for 1 month until today. When I measure with the multimeter A0 gives me almost 4.3V and A1 gives 8mV(which may be fine). Can someone help me?

Code:
void setup()
{ Serial.begin(9600);
pinMode(A0, INPUT);
pinMode(A1, INPUT);
}
void loop()
{ Serial.print(analogRead(0));
Serial.print(' ');
Serial.print(analogRead(1));
Serial.println(' ');
delay(200);
}

2

So it worked for a month and now does not.
Sounds like you have a hardware problem.
How have you wired things up. Schematics and links to the components please.

When I measure with the multimeter A0 gives me almost 4.3V and A1 gives 8mV(which may be fine).

So is this different that the serial print is telling you?