2003 obd-II code 0102

[rcpdrummer]

This trouble code tells me there is a low input voltage to the maf sensor. Changed the maf yesterday to no avail car still runs rough after warming up . It is the 3.0 DOHC engine. Any thoughts or suggestions on how to remedy this problem would be greatly appreciated. I'm pretty adept at fixing car engines except when it comes to all this electronic BS. I'm at a loss

[shorod]

Welcome to the forum!

According to the service manual, the following are items you should check:

• MAF sensor disconnected
• MAF circuit open to PCM
• VPWR open to MAF sensor
• PWR GND open to MAF sensor
• MAF RTN circuit open to PCM
• MAF circuit shorted to GND
• Intake air leak (near MAF sensor)
• A closed throttle indication [throttle position (TP) sensor system]
• Damaged MAF sensor
• Damaged PCM

Have you checked the reference voltage with respect to MAF ground to make sure it is what it should be? You'll want to do this with the MAF disconnected and again by backprobing with the MAF connected to make sure the MAF is not loading the reference line excessively.

Also, make sure that all the connections on the air intake are secure and you don't have a hose end rolled over or something.

-Rod

[rcpdrummer]

Originally Posted by shorod

Welcome to the forum!

According to the service manual, the following are items you should check:

• MAF sensor disconnected
• MAF circuit open to PCM
• VPWR open to MAF sensor
• PWR GND open to MAF sensor
• MAF RTN circuit open to PCM
• MAF circuit shorted to GND
• Intake air leak (near MAF sensor)
• A closed throttle indication [throttle position (TP) sensor system]
• Damaged MAF sensor
• Damaged PCM

Have you checked the reference voltage with respect to MAF ground to make sure it is what it should be? You'll want to do this with the MAF disconnected and again by backprobing with the MAF connected to make sure the MAF is not loading the reference line excessively.

Also, make sure that all the connections on the air intake are secure and you don't have a hose end rolled over or something.

-Rod

Thanks for the welcome Rod.

Well we dropped it off at the Ford Dealer today . Just got a call on it wich it seems to be that a temp sensor is telling the computer to shut the engine down because it is overheating(won't turn on the cooling fans either so the car will overheat). $138.00 to remedy this , so will see what happens. I'll keep you posted as to the outcome.

Looks like a great Forum with alot of helpful peeps out there.

Thanks Again, Rich

[shorod]

Originally Posted by rcpdrummer

Looks like a great Forum with alot of helpful peeps out there.

And you're another one since you took the time to post what the dealer believes it will take to fix the problem. Thank you for offering that, and I hope it solves your issue!

-Rod