hold light/rev counter

larry787 · Post by **larry787** » Wed Jun 11, 2014 10:44 am

Hi all I could really do with some help with a little problem I have.
Most of the time my Bongo runs really well with no issues then for no reason the rev counter goes all wibbly wobbly the hold light starts flashing and the gearbox (auto) drops down i cog and wont change back up, I stop and turn the ignition off leave it a couple of minutes restart and normally the rev counter goes back to normal and the hold light goes out and we carry on our merry way very occasionally i need to stop and start it a couple of times before the rev counter goes back to normal.
So where do I start looking to solve the issue.
Thanks
Graham

Driver+Passengers · Post by **Driver+Passengers** » Wed Jun 11, 2014 11:14 am

Hi and welcome!

You'll need to note the pattern of flashes next time it happens - here is a good place to start reading: http://www.philmcfadden.co.uk/MazdaDiagnosticBox.htm

Post by **Simon Jones** » Wed Jun 11, 2014 12:17 pm

Petrol or diesel?

larry787 · Post by **larry787** » Wed Jun 11, 2014 8:48 pm

its a diesel

Ahead · Post by **Ahead** » Wed Jun 11, 2014 9:54 pm

Def Rev counter, not speedo playing up?

Post by **Ian** » Wed Jun 11, 2014 10:18 pm

Throttle position sensor?

larry787 · Post by **larry787** » Wed Jun 11, 2014 10:24 pm

its defo the rev counter that's goes wobbly

southwestie · Post by **southwestie** » Tue Jun 17, 2014 9:33 am

Driver+Passengers wrote:Hi and welcome!

You'll need to note the pattern of flashes next time it happens - here is a good place to start reading: http://www.philmcfadden.co.uk/MazdaDiagnosticBox.htm

Jumping onboard here (hope you don't mind) as I have very similar transmission problems and need to read the flashing hold light sequence. Just looking at the link above, it seems a jump lead is necessary. Can anyone tell me where do I get one of these from?

Thanks.

Post by **g8dhe** » Tue Jun 17, 2014 10:29 am

Paper clip from the stationery store

Any bit of wire to jump between the two connections shown, short length of wire from a bit of mains flex, paper clip whatever you have to hand!

southwestie · Post by **southwestie** » Wed Jun 18, 2014 6:35 pm

Wow

Just like being in the A Team

southwestie · Post by **southwestie** » Thu Jun 26, 2014 9:59 pm

Thanks g8dhe for the tips.

Mines a diesel, automatic 4wd. Getting two codes from the hold light sequence:

12 - throttle position sensor
16 - not listed in the Automatic Transmission Malfunction Codes (from the philmcfadden link above), but in the Engine Malfunction Codes its described as EGR position sensor.

Can anyone advise, if it's possible to remedy these faults easily, or will the van need to be taken to a specialist?

Thanks

Post by **g8dhe** » Fri Jun 27, 2014 10:16 am

Given that the rev display fails I would check the RPM sensor first, mobile at present but a search will locate its position on the diesel.

larry787 · Post by **larry787** » Sat Jun 28, 2014 7:54 pm

thanks for the advice Geoff any idea what the rpm sensor looks like and where it is liable to be

larry787 · Post by **larry787** » Sat Jun 28, 2014 7:54 pm

thanks for the advice Geoff any idea what the rpm sensor looks like and where it is liable to be

Post by **Simon Jones** » Sat Jun 28, 2014 11:23 pm

Just in front of injector pump:

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