Engine light on

[aridethis1]

I have a 1999 sieres ll disco . The engine light has been on for a while . I had the codes read , and it comes up 1772 and 1774 running too ritch . I now have to pass inspection ! Any ideas to what it could be ? truck has 121k. Also the abs tc and HDC is on :banghead: Thanks

 

[barefoot]

those are both rich codes alright.

the first thing i think of when running rich alone are o2 sensors.

however, without hooking to testbook or the like to look at real time sensor data to see what is going on...you could be stabbing at the wind when it come to replacing parts.

enjoy!

 

[aridethis1]

I heard it could also be the mass airflow sensor

 

[barefoot]

could be.....