P0150 fouled o2 sensor

wrldky · Mar 18, 2017

Getting this code. Cleaned sensor and replaced it but it continues to foul with some black soot. Any advice? 2002 disco sd with sai

AbnMike · Mar 18, 2017

Since you have a scanner, what are your fuel trims? There's a lot out there on google about this code - anywhere from an intake leak to bad injectors.

What do your plugs look like?

Here's one http://landroverforums.com/forum/discovery-ii-18/code-p0150-disco-ii-2003-w-sai-36169/

mearstrae · Mar 21, 2017

I had this same problem today. It turned out to be a broken PCV at the intake causing a severe vacuum leak.