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Topic: o/d light flashing (Read 401 times) |
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gaz01gaz
Full Member
2.9 cos...what else????
 
Posts: 205
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o/d light flashing
« on: Dec 2nd, 2004, 5:46pm » |
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please can anyone advise!!!! scorpio 2.9 cossy 1997 112k..on the motorway when the box changes to fourth (o/d) it does the cattle grid thing occasionally but then the o/d light flashes even though it is running ok in fourth gear (o/d)...once the car is restarted all is well with the o/d light again  it does not slip or act in any unproper manner other than this..
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Dave Boulton
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Hi, and welcome!
Firstly, have a read of http://www.fordscorpio.co.uk/odlight.htm - loads of useful stuff there if you haven't already seen it...
Sounds like cleaning the MAF would be a good place to start. Otherwise, where abouts are you? Maybe you could meet up with another member for an OBD-2 scan and some diagnostics.
HTH,
Dave
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gaz01gaz
Full Member
2.9 cos...what else????
Posts: 205
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Re: o/d light flashing
« Reply #2 on: Dec 3rd, 2004, 10:27am » |
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i live in sheffield so would be most grateful if there is someone who could do an obd -2 scan for me,i have cleaned the maf but not yet been at any great speed,,,i will try it today and post the results,,,by the way what a wonderfull informative site this is....many thanks ...gaz
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gaz01gaz
Full Member
2.9 cos...what else????
Posts: 205
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Re: o/d light flashing
« Reply #3 on: Dec 4th, 2004, 2:10am » |
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hi again,,,i have run the car after cleaning m.a.f don't know if its psychological but does feel smoother,,,unfortunately still got "cattle grid" syndrome,,,(tolerable) but "o/d off" light flashes for a while,,does this indicate a problem on the boxregards...gaz (2.9 cossy)
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Eric_R
Administrator
Cosworth Owner 1998 - 2006 & site co-founder
Posts: 1792
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Re: o/d light flashing
« Reply #4 on: Dec 4th, 2004, 11:01am » |
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Gaz,
Yes, this is a recognised phenomenon (phew) we identified some years ago, Read the write-up on http://www.fordscorpio.co.uk/cattle.htm. The best trick is to avoid it using the OD button to shift out of 4th before you use the power.
Re the flashing OD light, yes this indicates a problem somewhere. You have seen the list of problems that causes the light on the page that Dave mentions. The only way to be sure which it is is to have the OBD codes read and go on from there.
Sometimes cleaning the MAF has solved the problem (a sooted MAF can cause an incorrect ratio error) but if you're sure you've cleaned the MAF properly with a residue-free cleaner then it won't be this.
It could be reporting a problem with one of the sensors (TFT, TSS, VSS) or a lazy/stuck solenoid.
If you can't find an owner with an OBD in your area, ring around local garages and ask if they can do Ford diagnostics and how much. Most independants have the gear to check for codes now. Once you get the DTC come back to us.
Good luck.
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