Fail Smog, high HC

Hi, I took my 97 BMW 528i for a Smog and my vehicle. I paid $95 for a diagnosed and I was told my vehicle needs replacement of 2 catalytic converters.

My readings of the 02S12(V) and 02S22(V) are steady from 0.980 to 0.975. I though this meant catalytics are working find. Please advise. When I increase rpm to 2500 to 3000 readings are the same.

Please see attached Actron scanner readings. Readings are at idle on drive.

Also for some reason my secondary air monitor won’t complete. Two weeks back it was one of the first monitor to complete no matter how many times I reset monitors. Secondary vacuum and switch valve are wroking fine.

Smog Check Vehicle Inspection Report

%CO %CO HC(PPM) CO(%) NO(PPM)
Test – RPM – MEAS – MEAS – MAX – AVE – MEAS – MAX – AVE – MEAS – MAX – AVE – MEAS – Results
15mph – 1854 – 14.6 – 0.0 – 51 – 9 – 86 – 0.48 – 0.03 – 0.13 – 419 – 67 – 344 – FAIL
25MPH – 1819 – 14.6 – 0.0 – 35 – 6 – 48 – 0.46 – 0.03 – 0.12 – 706 – 62 – 114 – FAIL

Attachments:

• 97BMW.txt

Topic

[Harold PimentaParticipant]

Efrain: Any update on the high HC problem? I am going through the same issue, although not a BMW, still a German car.

[Author]

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