vauhall management fault

[BAR0711]

can you advise i have a 98 diesil 2 litre which runs fine until it gets warm then the engine management light comes on and power is lost when the revs get above 2.5 revs but if you driver around town it comes on until you rev over 2.5 it doesnt make any sense to me Iive tried to plug in codes but only found a valve problem or a exhaust fault neither seem to be it has any one else come across this cheers

[PhilLew]

Hi BAR0711,

It may not be a valve or exhaust at fault but the valve or exhast SENSOR which is faulty, this will put the engine management unit into 'safe' or 'get you home' mode which will cause a loss of power and the engine management light to come on.

Only way to find out is to replace the sensor.

I had a 98 Vectra in which the crank speed sensor and cam sensor went within 3 months of each other, nothing wrong with the crank or cam but a total �500 bill to replace the faulty sensors!

Good Luck!

[Julia6]

jj