Fiat 500 P0158: Oxygen Sensor High Voltage (Bank 2 -Sensor 2)
P0158 is an OBDII code that occurs in many vehicles, including the Fiat 500. The code is triggered when: The voltage at the O2 sensor remains above threshold for 20 seconds or more Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself There are also some less likely problems … Read more