HELP C20LET Ecu Fault Codes 31,19,117

[Bodster]

Jus got my engine running after rebuilding it completly

Its was starting fine and running fine

But today i took it out a wee run round block to see how it was going and it conked out

Wouldnt start so towed her home and read Ecu fault codes

Please note ecu light was on b4 i conked out and has been since rebuilding her and i jus put it down to memory needing reset as it also needed this done last time i rebuilt it

With engine not starting i read codes with engine turned off and got

31 Engine RPM signal (crankshaft sensor) No signal

Which i though was fine as engine wasnt running so would show that but thought it strange this is all that came up

But try'd turning engine over and it fired up after about 10 turns and did so 3 times when i try again again so its not starting properly first of all

BUT

with engine going i now get

19 RPM signal (crankshaft sensor) Incorrect signal

and

117 Wastegate valve Low voltage (which i got last time we rebuilt engine and it was jus a broken wire on Amel valve which i have unplugged jus now so engine can run in without having to worry about 280 horse wanting to play

SO WHATS YOUR OPINION'S (sp)

[Mr M3]

Are you saying you don't think it needs a new crank sensor? As the other two codes you have answers for.

[Bodster]

uM NO I THINK IT NEEDS ONE OR MAY BE IT JUS BROKE

but not sure what im doing really

[Mr M3]

It does run close to the turbo so gets hot. I routed mine differently to avoid this, and the hours of pain to route it the original way.
31 was down to it not running, and 117 sounds like it's down to you unplugging.

[Bodster]

But is the 19 code connected to not starting and cutting out as found this thread

2nd post down

Fault Code Diagnostic Help needed from experts!

"when the crank sensor went on the Corsa it would still start but after about 10 secs of cranking. The ECU light came on and I was limited to about 3000rpm"

BUT NEVER TAKEN CAR OVER 3K ?????????????? so no idea

[Bodster]

Also see this thread >????????????

http://www.migweb.co.uk/forums/showt...83#post2018083

[Mr M3]

I think the crank sensor causes many faults, including the starting. One went on a 2.0 cav i had, got best performance from changing gear below 2k.

[Bodster]

Can it be tested or anything done or is it jus if its plugged in and wires not knacked etc then it all ok and i jus need a new sensor

Still cant see her in bay?????

[Mr M3]

They're cheap enough at autovaux. Can't see the sensor?
If you follow the cable down the front left of the block it goes behind the mount iirc.

[Bodster]

Right jus checked code again with engine running and wit amel valve connected it still gives me 117,

How long does this take to clear or will it now be a fault logged

As i said my wiring broke to amel valve so i used bullet connectors so i have 2 ways of connecting it but not sure on which is righ but try both and still 117 flashs up ill go get a pic and show which way iv got her

[Mr M3]

Just whip the battery lead off for a few minutes, then re-check.

[Bodster]

This way iv got it and im sure it the way i had her b4 but try'd both ways and nothing,






Will whip battery off but need to make sure it on correct way first

Is this the cheeky little bugger hiding behind the mount, look all fine to me



CAN CAR STILL BE RUN WITH THIS "BROKEN" as want to take her out to wash car

[rodgerq]

ssounds like the crank sensor could be on its way out to me.

heres a pic of the way the wires go in the plug



you can work out which way yours go from that or incase yer thick, you have them the correct way

rodgerq