20 Most Recent 2009 Ford Focus - Page 6 Questions & Answers

The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems ca cause many drive-ability related problem such as rough idle and other symptoms

Mercedes commans sat nav version 4.1 for E220, is saying off road, and when at home is showing on map that I am somewhere in the National Park Peak District. I have been told to remove fuse for sat nav should be no 28 but in boot of car near sat nav cassette fuses in box only go upto 20. Am I looking in the right place?

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..

auto parts stores sell a install kit with a gauge and directions

If you have no lights or power to the starter, I would look at the large fuses and/or fuseable links. Also look at the ground connections.

The lighter element (that part tha heats) is likely shorted replace it.

Horn, horn relay, or horn blow pad on steering wheel (if equipped)