![I drive a 2004 Nissan Altima 2.5. The Service Engine Soon light came on this morning, I diagnosed it with an OBDII scanner and it's reading a PO420 code. I thinking it's I drive a 2004 Nissan Altima 2.5. The Service Engine Soon light came on this morning, I diagnosed it with an OBDII scanner and it's reading a PO420 code. I thinking it's](https://preview.redd.it/e019jq0u6p251.jpg?auto=webp&s=ba0725f11fef546a31e81d82ff32ea9d943d1708)
I drive a 2004 Nissan Altima 2.5. The Service Engine Soon light came on this morning, I diagnosed it with an OBDII scanner and it's reading a PO420 code. I thinking it's
![Can oil change cause Service Engine Light + Low Oil Pressure + other 3 lights on and a dead car? — Car Forums at Edmunds.com Can oil change cause Service Engine Light + Low Oil Pressure + other 3 lights on and a dead car? — Car Forums at Edmunds.com](https://us.v-cdn.net/5021145/uploads/editor/7p/h0k4vhze81p1.jpg)
Can oil change cause Service Engine Light + Low Oil Pressure + other 3 lights on and a dead car? — Car Forums at Edmunds.com
![What Does Service Engine Soon Mean On Nissan Altima? - Car, Truck And Vehicle How To Guides - Vehicle Freak What Does Service Engine Soon Mean On Nissan Altima? - Car, Truck And Vehicle How To Guides - Vehicle Freak](https://vehiclefreak.com/wp-content/uploads/2021/08/nissan-altima.jpg.webp)