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.

Get it checked for the fault code(s), the fault could be a simple fix like an 02 sensor or dirty maff, but there are various reasons why the eml comes on, you could get a scanner off ebay/amazon and check for the codes as long as the scanner has the JOBD protocol

Yes a scanner is essential equipment.

The Ancel JP700 JOBD code reader works with my 2003 model for P-codes so I'm sure it will work with yours.

Or take it to your local garage and ask them to plug in their scanner. You don't have to use them to make any repairs needed...

I bought a scanner but it didn’t actually give me the exact problem.

it could of been vacuum leak , o2 sensor or maf .

I took a chance on a second hand maf on eBay for £30 , took 5 minutes to fit , no more engine light .

might be worth removing the maf sensor and giving it a proper clean , I reckon that would actually of fixed my problem, no need to buy a new one .

forgive my ignorence what is a maf thanks for all your responce.

12 minutes ago, philip klein said:

forgive my ignorence what is a maf thanks for all your responce.

Mass Air Flow sensor. It's just downstream of the air filter.

Edited March 29, 20232 yr by Geralt

thanks very much.will check.will buy ansel jp700 sounds good. thanks again for all help.