hi guys iv got a 2005 fiesta st and its doing my head in . the abs & handbrake light is on all the time & the mileage display flashes eac fail .
iv changed a throttle pedal & still the same . iv tried 2 throttle bodies still the same ? any ideas guys ? iv put it on a snap on diagnostic and got the following fault codes . u1900 , p0403 egr related but car has not got one , p0073 ambient air temp sensor circuit high (cant seem to find a air temp sensor) . iv changed the plugs aswell but its abit lumpy slight misfire on idle .

 

Have you had the ABS/ESP codes read?

I'd advise getting all the codes read (engine ECU, ABS/ESP) on a Ford IDS, this will give the correct fault codes and descriptions.

Ambient temp sensor is behind the front bumper in the centre. (bumper needs to be removed to access)

U codes are faults over the can-bus communications network.

If it was throttle pedal/body you'd have a throttle body/pedal code.

According to ETIS Pre 2/2006 had EGR valves, it's inbetween the coil pack and throttle body (if fitted).

 

iv had a look in engine bay and the egr valve is not there . don't know if its been blanked but the pipe that goes to it looks like its got a blocker on there also and I cant seem to find the plug that egr plugs into . iv been told prefacelifts do have egr aswell ?
but would any of these give my car the eac fail ? I been told by a ford breaker that for the abs problem I would need a new abs pump/module ? its ment to be a common fault on prefacelifts ?

 

If the EGR has been removed and not 'coded out' of the ECU it will expect it's there and put in a fault.

No point guessing and changing random parts, it needs diagnosing properly.

 

dont suppose you know anyone in Birmingham that would come out and diagnose it ?

 

Hi have a 06 st150 ( re map ebiach springs induction straight through exhaust magnicore leads etc) my handbrake light n handbrake light came on got it diagnostic tested the guy said abs on rear changed that went back still happend. Changed my module my speedo came back and solved the problem. There £700 new without fitting! I got a 2nd hand one and fitted myself didn't take long a few bolts on the bracket and torx on the back and take the battery out. Good luck