HI,EVERYONE ANY ADVICE GREATLY APPRECEATED.HAVE ALPHARD 2.4G. DONE APPROX,40,000 MILES.RUNS LIKE A DREAM.APPART FROM THE FACT THAT IT SEEMS EVERY SAY 400 TO 500 MILES THE ENGINE WARNING LIGHT COMES ON,AND ENGINE LOSES POWER,STUTTERS AND MAXIMUM SPEED APP20 MILES PER HOUR.EVERY TIME IT HAS HAPPENED,I TURN EGNITION OFF COMPLETELY,SWITCH BACK ON,DRIVES AGAIN BUITIFULLY.LITTLE BIT OF A CONCERN IF I WERE TO GO ON LONG TRIP.WOULD APPRECEATE ANY ADVICE.KIND REGARDS TO ALL.