How to reset fault codes

[shepv8]

Hi all,
as the title suggests, Is there a way of resetting codes. Does it matter if you drive with one on ie, does the engine go into a limp mode. Im having trouble with the IMRC.

[fordmondeoman]

fault codes that are stored wont effect the car at all, as there just a code to help diagnose a problem, its only if the problem is present then what ever the fault is will cause a issue with the car, this goes with all control units not just engine ecu

[DZFord]

Here is how I do it: http://www.fordforums.com.au/showthread.php?t=11312804

[Neale]

About "limp modes" & "fault codes"

This is whats stated in the Dealer Service Training Manual from the Ford Service Training Institute, that I have on the LS focus.

It talks about how the EOBD system works which in short motitors the systems of the engine.

It says

-If a monitoring system detects a fault and this is confirmed , the emission control malfunction indicator lamp (MIL) is switched on

-The fault protocols contain information about the nature of the fault and distance traveled since the illumination of the MIL.

- The emission control MIL ensures that a fault is recognised promptly so that repairs can be carried out quickly and high exhaust emissions avoided.

-The customer is recommended to take the vehicle to a Ford dealership as they have the necessary special tools and test equipment for systematic fault finding & rectification.

-Another part of the EOBD is the Data Link Connector (DLC), which has been standardised for all makes of vehicle and through which the monitoring authorities can read faults which affect emissions, which are recorded in the control module.


In another section it states-

-When a fault has be rectified , the fault memory must be cleared. The fault memory is part of the KAM (keep Alive Memory).

-Particularly after engine components have been changed, it is advantageous to clear the complete KAM, which includes the adaptive trim tables (self-learning tables)

-When the fault memory has been cleared, the code P1000 is stored in the KAM. this code is called a rediness code.

-The rediness code indicates that not all the monitoring systems have compleated their tests since the KAM was cleared.

-The rediness code is not deleted until all the tests of the monitoring system have been carried out during a drive cycle.

-This makes sure the vehicle is in order.

-If the system is not in order the emission control MIL when the fault is confirmed during the second trip.

I would reccomend getting the problem fixed by a mechanic because if there is a problem & you dont fix it properly the car can learn to drive around it thanks to its self-learning tables.
but may result in restricted performance, increased emissions & possibly reduced econonomy.

This is because the if the car sences something wrong it can adjust the ignition timing & the injected fuel quantity accordingly through an electronic throttle body.

I hope this helps

[shepv8]

yeah, thats some good feedback there guys. Thanking you. I took it to a mechanic who wasted all day and only gave it back to me saying "the manifold air intake control actuator " has a fault code. Im trying to get the actual code off him so I can accurately locate the problem. ( I wouldnt mind having a copy of that service manual you have!!!).........so, Im now looking to buy an OBD2 scantool so I can read my own fault codes and map realtime sensor operation/outputs.

[spedwards]

For a list of fault codes, general and Ford specific, check out http://www.focusowners.com/forum/viewtopic.php?t=27449

[brucewarring]

I have been thru all I can find but I cannot find the DLC connector. I have just brought a LS Ghia

[brucewarring]

Found it staring at me on the drivers side....