ECU problem.MAZDA3-2005 1,4

[wexbren]

Any experience of problem as follows;Engine light on all the time ,speedometer stops working, When engine reaches normal temp.turn off igniton for 30secs.on restarting speedo.o.k.until engine goes cold again!!!
Dealers (mazda) only solution is to replace ECU at a cost of E2000.00!!
The car runs perfectly , no probs.other than this.Too spend this amount on a car with s/h value just double the cost of repair would be nonsence.
Anyone similar experience,or sugestions/

Many thanks*

 

[wotan]

Second hand ECU from breakers yard, might be worth a try, before going to any major expense.
Might be worth checking the various sensors, as the ECU can only interpret the signals given to it.
Mass airflow, throttle position sensor, camshaft / crankshaft position sensors to name a few.

Wotan

 

[Burnerman]

Check out BBA- Reman...they could have a solution for you.
John

 

[readingrabbit]

Hi

Did you manage to find the solution? I know this thread is old but I too have exactly the same problem.

cheers

Any experience of problem as follows;Engine light on all the time ,speedometer stops working, When engine reaches normal temp.turn off igniton for 30secs.on restarting speedo.o.k.until engine goes cold again!!!
Dealers (mazda) only solution is to replace ECU at a cost of E2000.00!!
The car runs perfectly , no probs.other than this.Too spend this amount on a car with s/h value just double the cost of repair would be nonsence.
Anyone similar experience,or sugestions/

Many thanks*

 

[Mursal]

They seem to have an issue with the ABS/Wheel sensors, giving exactly the problems you describe.

Best to get the fault codes read to see why the light is on. You don't have to get them to fix it, just ask for the codes/list of faults that come up.