Omega Owners Forum

Chat Area => General Car Chat => Topic started by: Ken T on 22 December 2009, 19:47:48

Title: Corsa engine management light on
Post by: Ken T on 22 December 2009, 19:47:48

just had a look at a friends '53 Corsa that has put on the engine management light. The codes were 130, 560, 130 and 170, which is O2 sensor, system volts, and exhaust rich/lean. Strange thing is it gave the system volts as 9.7V ?. I checked the battery and its up at 14.3V ?. Any ideas ?.

ken

Title: Re: Corsa engine management light on
Post by: Entwood on 22 December 2009, 19:51:39

Check both battery terminals for heating, if at all warm check for corrosion... you have measured the battery .. if the terminals/connections are corroded the energy wil be wasted as heat and the voltage will drop markedly.

If they all look good take a jump lead from the earth (0V) terminal directly to  the engine, re-check .. if the votage is now normal you have an earth lead (0V) problem.

HTH

Title: Re: Corsa engine management light on
Post by: Ken T on 22 December 2009, 19:58:47

Thanks for that, the terminals "looked" ok, but I didn't check further. I'll get them to check it tomorrow. Strange, supposedly the car is starting OK. Where does the ECU get its earth from ?.

Ken

Title: Re: Corsa engine management light on
Post by: Entwood on 22 December 2009, 20:12:17

Quote

Thanks for that, the terminals "looked" ok, but I didn't check further. I'll get them to check it tomorrow. Strange, supposedly the car is starting OK. Where does the ECU get its earth from ?.

Ken

No idea  ::) ::) ::)

But if the voltage at the ECU and/or the sensors are nearly 5 volts out my guess is they ain't gonna work right !!!

So my priority would be the voltage side...as it might well cause all other problems to dissapear once sorted  :)

Title: Re: Corsa engine management light on
Post by: Ken T on 22 December 2009, 21:16:44

Yes, this could be the cause of all the codes cars are too complicated these days !.

Thanks again,

Ken