OK. Did some looking through the manual. Yes code 24 is the o2 sensor. First you have to clear the fault code. Then erase codes to get the check engine light to go out. So to keep it simple I will start from the diagnostic mode.
1. Key off- kill run position
2. Press and hold select and reset
3. Turn key on
4. Wait for dIAG to appear
5. Press and hold select and rest again
6. Wait for d01 to appear.
7. Turn kill switch to off
8. Then scroll to code 24
9. Turn kill switch to run
10. Start engine and let idle.
This should clear code 24. If not then the problem is still there. Check the wiring and connections for the o2 sensor and fuel pump. You might have to check the fuel pressure at the pump if that does not work (46.1 PSI). Once you have found the problem repeat steps 1-10 again. Now to get rid of the check engine light repeat steps 1-7. Scroll to code 62 then put kill switch in run position. That should clear the check engine light.
I found this for clearing the codes. They're talking about code 24 but the same procedure should apply to all codes.