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[Mercdan]

Hi all I'm a new omega owner,recently bought a really clean 2.2 cd 2001 model in metallic grey
Bought very cheap from salvage market,I suspect because the previous owner suspected a serious fault?
The problem I thought I'd solved with a new gm cam sensor has surfaced again, basically as soon as the car gets up to running temp,the gearbox goes into limp mode and the eml light stays on
A friend plugged into his laptop and the codes coming up are,p1781 not present and p1740 present
He cleared these down but again as soon as the car gets warm the warning lights come on and the car reverts to limp mode
I've followed a few tips  on here and cleaned the throttle body,replaced the cam sensor with a genuine one,compression test proved all good,changed the plugs so far no success
Any help appreciated,thinking coilpack next?? Car is such a good one I want to sort it out and start using it whilst I have my 1998 E class spruced up,thanks for any help,Danny

[TheBoy]

Firstly, stop randomly replacing parts, you'll complicate the diagnosis.

What codes were in the gearbox and the ABS ecu?

[TheBoy]

Actually, they might be the gearbox codes:

P1781 - CAN errors (common when one ECU is in an error recovery mode)
P1740 - Torque signal


Worth seeing whats in ABS as well.

[Mercdan]

Thanks,please excuse my ignorance but is this a different plug in point separate from the one under the steering area?

[TheBoy]

Nope, same socket, different options on diag tool

[Mercdan]

No other faults showing,again car running fine tonight as soon as it gets up to running temp the spanner light comes on and limp mode activates,suspect coilpack or maf sensor after hours of Internet trawling....??

[05omegav6]

No other faults showing,again car running fine tonight as soon as it gets up to running temp the spanner light comes on and limp mode activates,suspect coilpack or maf sensor after hours of Internet trawling....??

Maf is easy to check...

Unplug it and see if it runs better... if yes, then you need a new maf. If it makes no odds, then you don't. Simples

[Steve B]

No other faults showing,again car running fine tonight as soon as it gets up to running temp the spanner light comes on and limp mode activates,suspect coilpack or maf sensor after hours of Internet trawling....??

And to add to the above...Coil pack gives out a misfire code

[Steve B]

Hi all I'm a new omega owner,recently bought a really clean 2.2 cd 2001 model in metallic grey
Bought very cheap from salvage market,I suspect because the previous owner suspected a serious fault?
The problem I thought I'd solved with a new gm cam sensor has surfaced again, basically as soon as the car gets up to running temp,the gearbox goes into limp mode and the eml light stays on
A friend plugged into his laptop and the codes coming up are,p1781 not present and p1740 present
He cleared these down but again as soon as the car gets warm the warning lights come on and the car reverts to limp mode
I've followed a few tips  on here and cleaned the throttle body,replaced the cam sensor with a genuine one,compression test proved all good,changed the plugs so far no success
Any help appreciated,thinking coilpack next?? Car is such a good one I want to sort it out and start using it whilst I have my 1998 E class spruced up,thanks for any help,Danny

Where did you buy that from.   

[baggers]

Just a quicky, when it reaches "running temp" what temp is your gauge showing and does it continue to rise towards the hot?
Do the cooling fans kick in?

[Mercdan]

Just a quicky, when it reaches "running temp" what temp is your gauge showing and does it continue to rise towards the hot?
Do the cooling fans kick in?

running temp is just in the 80 on gauge fan kicks in gets no hitter tried a cheap cam sensor the. Bought a proper fm one from vauxparts

[05omegav6]

Just a quicky, when it reaches "running temp" what temp is your gauge showing and does it continue to rise towards the hot?
Do the cooling fans kick in?

running temp is just in the 80 on gauge fan kicks in gets no hitter tried a cheap cam sensor the. Bought a proper fm one from vauxparts

Unless you bought a genuine sensor from a genuine dealer that you genuinely had to walk into to order and collect it, then you're pissing in the wind

[Mercdan]

It's a genuine part in a sealed bag with fm parts number on?

[Mercdan]

Gm number on parts and bag not a pattern cheapie

[05omegav6]

It's a genuine part in a sealed bag with fm parts number on?

Did you buy it remotely or in person?