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[Nickbat]

Is there any sensor in the autobox which detects whether the car is going downhill? I am still occasionally getting the limp home mode (until I stop and restart the engine) but it ONLY happens when I feather the throttle going down an incline.  The box doesn't want to change up, but finally does with a kick - then the light comes on.

[Kevin Wood]

Nothing specifically, but the ECU can easily determine this from the information it has. (engine torque output and rate of change of road speed for example).

Have you read the codes from the gearbox ECU?

[Shackeng]

My autobox changes down after a while on a downslope of more than a certain amount.

[pscocoa]

Is there any sensor in the autobox which detects whether the car is going downhill? I am still occasionally getting the limp home mode (until I stop and restart the engine) but it ONLY happens when I feather the throttle going down an incline.  The box doesn't want to change up, but finally does with a kick - then the light comes on.

Has the crank sensor been changed recently?

[Nickbat]

Nothing specifically, but the ECU can easily determine this from the information it has. (engine torque output and rate of change of road speed for example).

Have you read the codes from the gearbox ECU?

When it was last in the dealers, they said they were "unable to communicate" with the gearbox ecu. 

[Nickbat]

Is there any sensor in the autobox which detects whether the car is going downhill? I am still occasionally getting the limp home mode (until I stop and restart the engine) but it ONLY happens when I feather the throttle going down an incline.  The box doesn't want to change up, but finally does with a kick - then the light comes on.

Has the crank sensor been changed recently?

No, mate, it hasn't.

[sassanach]

quite likely to be the old favourite. the 2-3 solenoid.

[feeutfo]

Is this the same issue AA had..? Limp mode aside?

He swapped his gearbox ecu for another, to test, and the problem went away.

[Nickbat]

Is this the same issue AA had..? Limp mode aside?

He swapped his gearbox ecu for another, to test, and the problem went away.

Don't know, Chris, I missed reading about his gearbox issue. Is it a big job to change the ecu? 

[Nickbat]

quite likely to be the old favourite. the 2-3 solenoid.

Hmm. I've heard of that before. I assume it is a gearbox-out job to repair. 

[Kevin Wood]

quite likely to be the old favourite. the 2-3 solenoid.

Hmm. I've heard of that before. I assume it is a gearbox-out job to repair. 

No. Just the sump(s) off.

[Nickbat]

quite likely to be the old favourite. the 2-3 solenoid.

Hmm. I've heard of that before. I assume it is a gearbox-out job to repair. 

No. Just the sump(s) off.

Thanks, Kevin.

Could you do me a favour and identify it on this website, then paste the code (given in the box) for the pic? I've had look but can't see it.

http://opeloem.com/opel/omega_b_1994_2003/transmission/four_speed_automatic_transmission/

TIA 

Nick

[Kevin Wood]

You can see the valves here: http://opeloem.com/opel/omega_b_1994_2003/transmission/four_speed_automatic_transmission/valve_body.html

Not sure which is the 2-3 off the top of my head though.

[Nickbat]

You can see the valves here: http://opeloem.com/opel/omega_b_1994_2003/transmission/four_speed_automatic_transmission/valve_body.html

Not sure which is the 2-3 off the top of my head though.

Yep, thanks Kevin. just found it as you posted.



It's No 17!

[feeutfo]

Is this the same issue AA had..? Limp mode aside?

He swapped his gearbox ecu for another, to test, and the problem went away.

Don't know, Chris, I missed reading about his gearbox issue. Is it a big job to change the ecu? 

nah, took about 10mins. Drivers kick panel. I'd see what he says though, he didn't have limp mode iirc.