I've got the same problem on a 92 legend. The D4 flashes after about 3 minutes of driving and does not stop until shut off.
No engine light, no problems with the way it drives or shifts.
I bought a HELMS manual and they show how to apply a wire to short across the ECM and the D4 light will flash a "code", telling you what the problem is.
I'm tracking down that now.
It happened to my 91 Legend. It meant thet my vehicle speed sensor was no good.
check eng. light code 2716
we have a eng code 128s 370 02 we have a eng code 128s 370 02 we have a eng code 128s 370 02
I don't know the answer you need but, my 99 toyo tacoma has eng. light on and the code reads po141...heat sensor unit....I am mechanicly inept...if you get an answer,I think I will too !
problem is not sensor but is in wiring to sensor or computer
Need more info!!!! Is the check eng. light on???What eng. is it??
ZAH 1979 Corvette L48 auto
I want to say 60-90k miles, but to be certain contact your local ford dealer and ask them the scheduled maintenance for it. UK recommendations are 1.6 Ltr eng code L1L 100,000mls or 10 yrs 1.8 Ltr eng code RKF 100,000mls or 10 yrs 1.8 Diesel eng code RFN 70,000mls or 5yrs 2.0ltr eng code NGB 100,000mls or 10 yrs 2.5ltr eng code SEA chain driven All Mondeo's manufactured after 2000 are fitted with timing chains I hope this helps
Trouble code P0304 means:Cylinder 4 misfire detected
check the multi connector under the air filter they get water in them and corrode.
What the heck.