I got an e3 error on my mp150. Do you know what it means and how to solve this problem?

E3 means paper jam error

There's a problem with you mechanical alignment or try this resetting...

Service mode operation procedures -
1) With the printer powered off but connected to a power source, press the Power button while pressing and holding
the Stop/ Reset button.
2) When the Power LED is lit, press the Stop/Reset button two times while pressing and holding the Power button.
3) When releasing the Power button and the Stop / Reset button (regardless of order), the printer will move into a
service mode. (Waiting for menu selection)
4) When the LED lights in green, press the Stop/Reset button the specified number of time(s) according to the
function listed in the table below.(Each time the Stop/Reset button is pressed, the LED lights alternately in
orange and green, starting with orange.)
The number of the Reset
button pressing
LED Function Remarks
0 time Green Power off
1 time Orange Service pattern print
2 times Green EEPROM print
3 times Orange EEPROM reset
4 times Green Waste ink counter reset See waste ink counter reset
procedures below.
5 times Orange Destination setting See Destination setting
procedures below.
6 times Green Print head deep cleaning
11 times Orange Button / LCD checking
12 or more times Returns to a menu selection