MA inspection diagnostic?


I’ve been trying to get an MA inspection sticker on a 1999

F150 for the last two months. The check engine light

indicates high CO2 levels, so I flunked the emissions

test…over and over again.

So, the mechanic replaced the O2 sensors, reset the

‘computer’, and advised me drive from Portmouth to

Peabody. He did another reading. No luck. I went home,

shut off the engine, and the check engine light came back


If it wasn’t the O2 sensors, he said it must be the catalytic

converter. I said, hold on, what about a problem with the

‘computer’. If you reset the thing, and the light stays off

until I turn it off, and the restart the thing. Wouldn’t that

indicate a problem with the ‘computer’? No, so he

replaced the catalytic converter. Now the light stays off,

but the readings are the same.

Didn’t the registry include a diagnostic tool to test the

inboard ‘computer’? I don’t anything about fixing cars,

but I know a lot about computers, and these guys seem

doing their diagnostic work based solely on basis a

reading from something that isn’t even a required piece of

safety equipment.

But there’s no way around it - or is there? I’ve driven cars

that were literally shedding parts of themselves on the

highway, but passed inspection with flying colors. This

truck isn’t that old, what’s the story? Seems like they

would get a more accurate reading if they hooked a

sensor to tailpipe like they did in the old days.