reeperb5

as title says...

since driving to manc other day the engine check light came on....

ok so i drove very slowly all the way up north... identified the the light to be the speed sensor on the gbox not working... thats fine i knew that...but..

why did it suddenly come on and not last week when i picked up the car from mechanic who fitted the nex box... he did say the engine check light would be on.. but nothing for a few days then suddenly now...?

but now as i rev the car on idle or driving it.. its all fine then BANG 4.5k is like ive hit a brick wall and feels like a Limiter....

q. has the eng light come on for more than just the speed sensor?
q. does the eng light come on and go into some sort of "safety mode"?

very confused... im convinced its not a misfire... plugs not very old....

i cant imagine this has anything to do with the bottom end knocking... and all this is just one big coincidense....

please help..

cheers

myblackwrx

iTrader: (1)

yes
identify the code again

reeperb5

OK..

but if it comes up with the same code then wot??

ive seen on JGM website how to reset the ecu but thats not gonna tell me if i have two error codes??

myblackwrx

iTrader: (1)

then i would guess the speed sensor is buggered.

Scoobypedia | Trusted knowledge for everything Subaru | Knowledge / Reading ECU Fault Codes

This shows how the CEL will show you if you have more than 1 code

4wheel

iTrader: (2)

car has gone in to limp mode, reset ecu will clear faults car will return to normal, have you cured the first fault?

reeperb5

not as yet...

waiting to collect the sesnsor then th mechanic will chuck it on for me...

didnt think the sensor would make all this difference... thought it would just be the case of no speedo..?

i know the speedo sensor is buggered.. my mechanic told me it snapped when fitting the new box.... what baffles me is that i got the car back last sat with no light.. just no speedo.....

and on NYE the eng check light suddenly came on, on the M6.... so random..

Jolly Green Monster

iTrader: (4)

the ecu will set rpm to 4500rpm with no speedo..

error code reading is the black connectors and is also on my site..

Simon

reeperb5

simon... i left you a voicemail mate..

psigeek

iTrader: (17)

Mate when I first picked up the Scoob 18 months ago I had this exact problem intermittently. It was diagnosed as the speed sensor from the error code and yeah it is like a brick wall! The speedo would sometimes just drop to 0mph and then back up again.

Subaru told me I needed a new one (from Japan) at £100 and that it might not fix it. They were telling me all sorts o how when they are imported people mess with the speedo, etc please. What you can do is remove the intercooler and look down onto the gearbox on the driver's side for the connector (mine was yellow plastic). Take it off and clean it with an airgun. I realise yours is off as broken but...

The other thing I did which cured the problem was to remove the clocks and undo and rewire each wire from the speedo convertor. I'm only assuming yours is JDM. However, this fixed the problem completely.

So by that just refitting yours should help!

reeperb5

mines a rb5 so a uk car, it makes sense that its being caused by the speedo sensor not being there.. so that just needs replacing..