Question about Ford Focus

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I changed my battery in my ford focus then when I put the new one in my antitheft light came on and it won't let me start my car.

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  • Ford Master
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Disarming a Triggered System
Carrying out either of the following steps will disarm the triggered anti - theft system.

  • Driver or passenger front door is unlocked with a key.
  • Pressing the UNLOCK button of a remote entry transmitter.
When the system has been triggered, the anti - theft horn will shut off automatically after 30 seconds and the turn signal lamps will shut off automatically after 5 minutes. The system will then reset to an armed state and will trigger again if another intrusion occurs.

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Posted on Nov 03, 2010

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 20003 Ford Focus. It will not crack unless you

alternator not charging

Posted on Jul 05, 2011

emissionwiz
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SOURCE: key fob not working after battery change ford focus 2006

Try reprogramming it.

1. Turn the ignition from OFF to RUN 4 times within 6 seconds.
2. Turn the ignition OFF. The system will chime to confirm programming mode.
3. Within 20 seconds, press any button on first keyless remote.
The system will chime once to confirm programming.

4. Within 20 seconds, press any button on second keyless remote.
System will chime once to confirm programming.

5. Turn ignition to RUN to exit programming mode.

Posted on May 28, 2009

  • 4376 Answers

SOURCE: antitheft and battery lite on 2006 ford freestar

Try your spare key first. also, does the anti theft visual indicator (red flashing light) prove out, that is light for three seconds when key is turned to on.

here's some info.

Principles of Operation
The passive anti-theft system (PATS) uses a specially encoded ignition key. Each encoded ignition key contains a permanently installed electronic device called a transponder. Each transponder contains a unique electronic identification code out of over 18 billion, billion combinations.
The passive anti-theft system (PATS), also known as SecuriLock ®, uses radio frequency identification technology to deter a drive-away theft. This system is known as SecuriLock® in North America, Safeguard® in the U.K., and PATS in continental Europe. Passive means that it does not require any activity from the user.
The SecuriLock® System (PATS) is not compatible with NON-FORD remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. If equipped, the remote start system must be removed before investigation of PATS-related, no-start issues.
Each encoded ignition key must be programmed into the vehicle's powertrain control module (PCM) before it can be used to start the engine. The correct ignition key is a different design than prior model years. Consult the Rotunda Key Ordering Guide for the correct part number. There are special diagnostic repair procedures described in this section that must be carried out if a new encoded ignition key is necessary.
This system contains a new feature named Unlimited Key Mode. This feature allows a customer to program more than eight keys to the vehicle if they request it. Each vehicle in Unlimited Key Mode is set up with a special unlimited transponder security key. This allows all the customer vehicles to share the same keys, but no other keys from outside can be used to operate the vehicles. For an individual customer, any randomly selected security key is acceptable. Refer to Unlimited Key Mode Programming in Key Programming Switch State Control in this section.
The PATS transceiver module communicates with the encoded ignition key. The module is located behind the steering column shroud and contains an antenna connected to a small electronics module. During each vehicle start sequence, the transceiver module reads the encoded ignition key identification code and sends data to the PCM.
The control functions are contained in the PCM. This module carries out all of the PATS functions, such as receiving the identification code from the encoded ignition key and controlling the engine enable. The PCM initiates the key interrogation sequence when the vehicle ignition switch is turned to RUN or START.
All elements of the PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start.
PATS uses a visual theft indicator. The indicator will prove out for three seconds when the ignition switch is turned to RUN or START under normal operation. If there is a PATS concern, this indicator will either flash rapidly or glow steadily when the ignition switch is turned to RUN or START. The PATS system also flashes the theft indicator every two seconds at ignition OFF to act as a visual deterrent.
PATS will be activated and will disable the vehicle from starting if there is:

  • an incorrectly encoded ignition key.
  • a damaged encoded ignition key.
  • an unprogrammed key
  • a non-encoded key (key has no electronics).
  • damaged wiring.
  • a damaged transceiver.
  • a damaged PCM.

Posted on Jan 09, 2009

  • 299 Answers

SOURCE: Ford Focus Alternator problem

Very possible if they were from auto zone or cheap knockoffs,Best to have original rebuilt or buy buy factory alt.

Posted on Jun 19, 2009

  • 534 Answers

SOURCE: I have a 2003 ford focus. Ford staes the

Check your battery ground connections. Make sure the vehicle chassis (and alternator) is properly grounded.
Check for any loose connections around the main high current 12V supply fuses.
Check the clicking in the steering column is not a loose supply wire arcing.

Posted on Jun 20, 2009

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1 Answer

2002 ford focus no start issue. When key in start position no dash lights and the anti theft light above hazards blink rapidly any1 have any idea as to the issue and fixes?


Has any work been done on the car recently? If so take it back. Possibility the antitheft system has been Hacked, or attempted hack. Dealer or competent repair shop. Possibly upto date locksmith can help.

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1 Answer

Hi all,I have a Ford focus 2004 tdci 1.8 and the immobiliser intermittently won't turn off,I've tried both keys and its still won't start.kind regards Dean


Ford products are sensitive to changes in Battery voltage. The system views low Voltage as an attempted theft and makes the Alarm go off.

Remove the Battery, return it with a full charge or new Battery. Some other symptoms would be slow cranking or clicking like a dead battery. The Antitheft reduces starter Voltage to around 7 Volts making starting nearly impossible.

Please rate my info. If all else fails, the Identity in the car memory may no longer match the identity on the car keys. You would need to have a Dealer rematch the keys to the car.

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1 Answer

My horn will not stop


You have activated the passive antitheft system connect the battery then lock and unlock the drivers door several times and try to start the vehicle make sure all doors and windows are up and locked and trunk closed before you connect the battery

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1 Answer

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Your battery is most likely dead if your lights go out. Charge or change your battery, but your altenater maybe be bad. It recharges your battery, if it don't work your battery will die..

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You changed the cylinder, did it come with new keys or did you have the new cylinder rekeyed to fit you old keys? It has a PATS antitheft system. You need to use your old keys or have the security system reprogrammed.

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1 Answer

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You would need some draw for the memory in the radio, the onboard computer, the antitheft and its Keychip reader, and possibly electronic shift memory.

Check your Battery case and put a temporary piece of cardboard under the battery. I once worked on an AMC car which had a dome light glowing. The case of the Battery was covered with an oil mist and on damp mornings the Battery would be dead. I found the problem by accident when the Roof of the car had an outline of the domelight in the frost on the roof. The residual heat from the once glowing domelight lasted longer than the Battery.

Sometimes its easier to find a short with the Battery disconnected and using an Ohmmeter on the cable leads.

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1 Answer

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may be a bad alt check voltage while running should be about 14 volts

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