SMOG/emission Failed

[DLag]

Hi guys, I just bought my ti at saturday. And today, I went to get it smog. Unfortunately, it failed. What I'm confused about is my car don't have a CEL. so what can it be?? I don't want to buy a 02 sensor or cat if its unnecessary...

btw my car is a 1998 and drove the car for a good 20 minutes.

here's the results

CO2
15 MPH (1909 RPM) 15.28 (Amounted Measured) PASSED
25 MPH (2925 RPM) 15.17 (Amounted Measured) PASSED
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O2
15 MPH (1909 RPM) 0.27 (Amounted Measured) PASSED
25 MPH (2925 RPM) 0.04 (Amounted Measured) PASSED
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HC (PPM)
15 MPH (1909 RPM) 60 (Maximum Allowed Emissions)
25 MPH (2925 RPM) 43 (Maximum Allowed Emissions)

15 MPH (1909 RPM) 9 (Average Emissions For Passing Vehicles)
25 MPH (2925 RPM) 7 (Average Emissions For Passing Vehicles)

15 MPH (1909 RPM) 69 (Amounted Measured) FAILED
25 MPH (2925 RPM) 28 (Amounted Measured) PASSED
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CO
15 MPH (1909 RPM) 0.53 (Maximum Allowed Emissions)
25 MPH (2925 RPM) 0.51 (Maximum Allowed Emissions)

15 MPH (1909 RPM) 0.02 (Average Emissions For Passing Vehicles)
25 MPH (2925 RPM) 0.03 (Average Emissions For Passing Vehicles)

15 MPH (1909 RPM) 0.25 (Amounted Measured) PASSED
25 MPH (2925 RPM) 0.09 (Amounted Measured) PASSED
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NO (PPM)
15 MPH (1909 RPM) 459 (Maximum Allowed Emissions)
25 MPH (2925 RPM) 746 (Maximum Allowed Emissions)

15 MPH (1909 RPM) 57 (Average Emissions For Passing Vehicles)
25 MPH (2925 RPM) 50 (Average Emissions For Passing Vehicles)

15 MPH (1909 RPM) 780 (Amounted Measured) FAILED
25 MPH (2529 RPM) 232 (Amounted Measured) PASSED
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