What would cause me not to get a reading on a diagnostic computer on my 2001 Ford Expedition

Have a diagnostic test done on it to find out if the ECM is faulty or a sensor that connects to it.

All of these are transmission codes. More diagnostics need to be done to it. Could be a bad solenoid, valve body, or a transmission rebuild.

Check engine light can mean many things. The only way to find out is to read the code using an OBD (On Board Diagnostic) reader.You need to take it somewhere they can do that. Some Auto parts shops will do it for free. It can be some thing simple as a bad gas tank cap or something serious like a computer problem.

Please read the manual that came with your 2001 Ford Explorer. It should tell you where the cruise control is located.
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it could be a fuse or a bad ground some were.

Hi,

Both these systems are monitored by your vehicle's OBDII computer.

Firstly, you need to have your diagnostic codes read from your OBD computer - your local Ford dealership would take about 15mins to do this while you wait.

Once you have identified the circuit/component causing these conditions, you can then look at suitable repair.

The EVAP system controls excess fuel vapor, so there could be a vapor leak somewhere.

The Catalytic converter is a very expensive item (its the bulging part at the front of your exhaust) - if faulty, it will have to be replaced.

Have your codes checked first, before you start replacing any unneccessary items.

Cheers,

This the check engine light and indicates that the computer has detected a problem with the engine system. You will need to get the diagnostic code read to identify the problem. Places like Auto Zone or NAPA stores will do this at no charge. Or you can take your car to the dealer or service station.
If the check engine light is blinking, take it in for service as soon as possible, you could cause damage if driven too long this way.

the OD light blinking is telling you that there is a problem with the trans. most auto parts stores will read the codes for free.

The data link gets it's power from the fuse that also powers the cig. lighter,is the cig. lighter working?
If not check fuse no.3 (20amp) in the interior fuse panel.

We have seen on some occasions that some scan tools just will not link up for some reason. We have had several vehicles that customer went to have their state inspections done and the tester at that shop would not link up.We hook our ford diagnostic tester to it and it links right up,we then hook them to our inspection machine(which is not ford equipment) and they link right up to it.