Top 20 2003 Ford Focus Questions & Answers

Question edited for clarity and spelling. Question moved to model category. Check out the link https://www.google.com/search?q=2003+ford+focus+replace+purge+valve+solenoid ..

The MAF (mass air flow sensor)? https://www.google.com/search?q=2003+ford+focus+zx3+maf+wiring+diagram ..

Engine light on? Anti-theft light flashing? Did you disconnect the battery? Have you checked for DTC codes?

Try this There are a few possible ways to reset the Ford Focus anti-theft security system. One way is to put the physical key in the lock, and then turn it to the unlock position. Do this, without moving it away from that unlock position for about 30 seconds. After that, You can unlock the car and start the engine.

What is the ford focus security system reset procedure?

Videos as well https://www.google.com/search?q=2003+ford+focus+security+reset ..

Speed control deactivation switch. As you see, the location may vary. Sometimes, the service department at your local dealership can be helpful, if their not busy. good luck.

You are most likely to have earthing or resistance issues. Funnily enough, I just watched this video last night. You will see the dim headlight scenario mentioned towards the end on a vehicle, but you need to know the testing procedure first. You will also need a digital multimeter. Or, you can just take it to an auto-electrician. https://www.youtube.com/watch?v=YaYtCVBodpw ..

I assume you think the transmission will not go into overdrive. Either the torque converter clutch solenoid has failed, is stuck or is not receiving the signal to activate from the control computer (may be a wiring problem). You can check with a good code reader if there is an error code, and if a signal is being sent to the transmission by using the code reader in live view, but troubleshooting the solenoid should be left to a transmission repair shop as the oil pan must be dropped to get at it.

Check vacuum hoses going to the IMRC for leaks

Take the numbers from the sticker, the VIN code and proof of ownership to a dealer to get the code. They won't do this over the phone. I hope this helps, Take care

https://www.aa1car.com/library/troubleshoot_antitheft_system.htm

Yup, been there, done that. Found it was a bad injector. Replaced that one injector the test showed and runs great now. Check engine light should be on though because of this problem. The test will show you which cylinder is misfiring and that is the injector you change. My test showed #5 cylinder. The last # in the code read.

This website www.reliable-store.com has the largest collection of repair, service, parts manuals of any vehicle on earth. Best website I came across for manuals.. Also have live assistance

Try some marvel mystery oil in your gas this should free the stuck valve

Tom, the high beams are operated via a relay in the engine compartment under the hood. Go there and remove the cover. Printed inside, typically, is a diagram for all fuses and relays. Find the one for the headlights. Have some one operate the lever in the car and listen for a small click on that relay. If no sound is heard most likely relay is stuck. They simply pull up and out. Go to car parts store and buy replacement.

These is also the likelihood that the switch in steering column is the issue but this will tell you that is the case. If replacing the relay dose not clear the problem then it's a much larger project to replace the switch stalk. Do the relay first.

The wires maybe broke off and are in the door but it depends if there's one wire at the lock ? That's for the interior lights when the doors are opened do you have any power locks on the other door? You must check the actuator's that they work and are plugged in at the back of the door where the lock is and check any fuses for the locks and go to Ford owners manual come and download the manual for free then go to roadside emergencies and the fuse box diagrams are there and in locks and security for the remote control programming sequence the remotes you can get on eBay keylessking in farmingdale new Jersey is your best shot here it's a great place you can get other keys for your pats system and cut and program them or cut and clone it especially if you only have 1key it's a big problem if you lose it $350.+keys and a tow truck to the dealer or the same$$for a locksmith if he has the machine to do it so I would hit up keylessking on eBay they are very quick shippers and high quality remotes and keys other sellers have junk that doesn't work I know first hand once you cut the key you can't return it if it doesn't work so take my advice and use keylessking for your stuff you won't be sorry they are the best shop for this stuff I'm a taxi mechanic in NYC with 50+years of experience and the knucklehead drivers lose there keys all the time this is where I get them and 100 out of 100 have all worked so I stay with the best suppliers for parts and recommend them as well as rock auto.com for your hard parts good luck Stephen

Replace either key cyclinder or ignition switch...

The engine system most affected by moisture is the high tension electrical system, so it is unlikely to be the starter or similar shorting out, but something like moisture getting into the distributor or coil. You might want to liberally spray any of the popular Water Dispersant (WDxx or similar) products on all your high tension components and leads. You can of course, spray the lower voltage components too, just for kicks. These Water Dispersant sprays are very inert so they are unlikely to cause harm, but will help keep moisture away and minimise the chance of shorts.

Get a second opinion and a maybe a different repair shop. Hissing is a BIG leak and should have been easy to find and fix the first time.

Instead of plugging the factory harness into the radio an adapter might be needed. ref. link: http://www.carstereohelp.com the above diagram is supposed to match your radio from the factory. The documentation with the new radio should provide the pins and plugs and what is on them. The correct plug or adapter should match up with the factory harness and work correctly.

no heat or no blower. HUGE difference between those two symptoms. Clarify