There’s a lot to my sordid tale so I’m going to try to be as brief and concise as possible: Car Info: 1998 Ford Taurus station wagon V6 3.0L DOHC “Service Engine Soon” light is ON. 140k miles. New spark plugs and air filter. Oil changed last week. Engine tune up and transmission flush ab…

First, here are the tests I performed tonight: THROTTLE POSITION SENSOR http://www.autozone.com/addVehicleId,2398304/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c1528003aaee engine OFF, ignition ON the signal return wire was 0.9v (which is good) engine OFF, ignition ON, slowly …

Your images have good resolution after left clicking on the image. Here is a poor resolution picture of a scan tool screen graph of a MAF (Mass Air Flow) sensor: http://www.autotap.com/images/mass_airflow_lrg.gif It might print out at a better resolution. The voltage values for the MAF, taken fr…

Ken, The O2 sensors have been replaced already. As far as the MAF causing the front O2 heater codes, I would like to know how that can be. Can you give us some feedback from your tech about that?

It sounds like you are really digging in on this thing. I live in Hillsborough and have had a little check engine light experience. I’m a techie and DIY type, but have mostly sworn off this sort of diagnostics. It’s my opinion that the codes are intentionally obscure and that Ford has more info t…

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Can your director of training give us an explination on how a MAF sensor is causing heater codes on the two front O2 sensors?

Quick update, then I’m going under the hood to slowly give every part a dirty look. The new PCM did not come in today, Autozone doesn’t know why. It’s a special order for, everyone. I went ahead and tried to attach my new MAF (which consists of the sensor itself attached to a big metal piece) BUT t…

That’s an important question to me.

There may not be anything wrong with the old MAF. The low voltages you read may be because of an electrical connector which, by disconnecting and reconnecting, wiped the pins and terminals well enough that the connector conducts electricity better. Change, and evaluate, only ONE part at a time. Oth…

Sordid Tale of a "Service Engine" Light

Maintenance/Repairs

kngamble September 17, 2008, 6:46pm 246

I’ll bet the Maf sensor does the trick. I asked my director of training about the situation this morning and he aggreed. The # for the show is 1-888-660-9535 8-10 sat. Ken Gamble

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Sordid Tale of a "Service Engine" Light

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