P0131 Oxygen sensor signal
When dealing with a P0131 it is important to check power to the 02 sensor , that or its fuse which is fuse 43, wiper motor shorting out set a P0131 or P0130. when you have this code it is a electrical problem, being a MBZ oil leaks onto the harness could damage the wire and if it grounds the 12 volts the ECM is destroyed. Open circuit of the 02 sensor, short circuit in the signal line, or a short circuit to positive, Check the harness connection
33.7k questions
32.5k answers
1.3k comments
23.0k users