Question about 2003 Ford Focus

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2003 Ford Focus. Ford dealer says computer memory totally erased. Alarm on car was going off for no reason right after car stalled on freeway.

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So the computer will have to be reprogrammed. But first will need to be checked for a proper ground. Most likely the ECU will have to be replaced.

Posted on Jul 28, 2009

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No keys,no money,allready ran a hot to the fuel pump and starter.is there a way to solder on the alarm computer pins and skip the pats system .im screwed


If you have the original owners manual and dealer packet, you can look for a small tag called a key code. With this you can get a duplicate key made at the dealership.

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2003 ford focus 2.0L everytime the key is turned off the emissions systems reset cant get it passed emissions because they keep going incomplete when the car is turned off


youronboard computer system must be programed by the dealer. there is a "glitch" in software that makes so pcm does not retain the drive cycle. go to any Ford dealer and request to have the PCM updated to the latest calibration and that WILL do the trick. When New York went to the light enhanced emission inspection, we had to program hubdreds of focus' to make pass insepction...there will be a charge for this service as your vehicle would be out of warrnaty by time...shoudl be around $100 depending upon labo rates at shop....

Jul 02, 2011 | 2003 Ford Focus

1 Answer

I have a 2002 Ford Focus ZX5 with a check engine light on.. Just out of curiousity, which fuse specifically controls a check enigne indicator on the dashes guage cluster. And if the fuse is pulled, what...


there is no fuse for that, you would either have to fix the issue for the reason the light is on or disconnect the battery for a few hours to erase the memory in the cars computer.

Dec 22, 2010 | 2003 Ford Focus

1 Answer

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2001 ford focus 1.8 Zetec just suddenly stalled and will not now restart.

Jul 12, 2009 | 2003 Ford Focus

2 Answers

Focus That stalls


you need a new fuel pump. There was a program to pay for this for 10 years I think for some 2000-01 Foucs. Here's what the letter from Ford says: December 2003 Program 03N01 "Attached is a letter announcing the details of a no-charge program Ford Motor Company will be conducting concerning your vehicle's fuel pump. We have found some 2000-01 Ford Focus vehicles may experience symptoms of engine hesitation, loss of power, surging and other similar symptoms ...... as a rsult of progressive contamination of the fuel pump filters." (in the fuel pump). You may reduce the liklihood of the symptoms occurring by kee[ing the tank at least half full. My recollection is the program was good for 10 years. Ask your local Ford Dealer if your car is eligible for this program.

Jun 14, 2009 | 2003 Ford Focus

1 Answer

My 2003 ford focus 4 cycl stalls after going 25mph


dont think so it could be the throttle sensor causeing the problem hope i have helped you

Apr 01, 2009 | 2003 Ford Focus

1 Answer

Ford Focus cutting out


Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Dec 03, 2008 | 2000 Ford Focus

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