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[holtender]

Have these two flashing up on a 2000 and they appear to be

0130 Heated Exhaust Gas Oxygen (Hego )sensor
0135 Heater Exhaust Gas Oxygen (Hego) sensor heater

Any ideas what is needed to sort the problems?

Where are these sensors?

[RobG]

   An oxygen sensor is a measuring probe for determining the oxygen content of the exhaust gas. Since the amount of oxygen in the exhaust gas indicates precisely how complete the combustion of the air-fuel mixture in the cylinders is, it is also the best starting point for controlling the air-fuel ratio.
The oxygen sensor is strategically located in the exhaust system. The outside surface of the ceramic measuring tube protrudes into the exhaust gas flow, and the inner surface is in contact with the outside air. A voltage is generated at the interface which is proportional to the relationship between residual oxygen in the exhaust gas and that of the surrounding air. When this relationship changes, so does the voltage. This voltage is processed  by an electronic control unit (ECU) into a control signal for influencing the air-fuel mixture through controllable fuel injection or carburetor systems. The exhaust gas composition is thus always maintained at that level which permits effective after-treatment by the vehicle's catalytic converter.

[Albatross]

Have a look at this larger overview by Kevin Wood on the Technical Guides section. You may find that he sees this thread and comes along to offer you some advice shortly as he is pretty damn good at this sort of fuel related thing.

http://www.omegaowners.com/forum/YaBB.pl?num=1223977027

He's been pretty active in helping me resolve some issues which I've been getting too. I don't know whether my 0170 and 0173 error codes are actually the same issues, but just new numbers in the context of my newer 3.2 engine.

You can see what we've worked out so far here:

http://www.omegaowners.com/forum/YaBB.pl?num=1219699194

As you're getting the codes 0130 AND 0135 that implies that both sides(or banks) of your engine / exhaust are behaving the same so I would start thinking about looking for issues that could be affecting the whole engine or fuel system rather than individual sensor failures.

[holtender]

Cheers for the replies lads, sounds like I have a real difficult one to solve!

The car is running just fine, I also had a cam sensor code flashing last week, but I replaced this and it disappeared.

[Kevin Wood]

It's complaining about the O2 sensor itself and the O2 sensor heater circuit. My first check would be that the oxygen sensor is actually plugged in. Could it be that someone has worked on it and left the plug hanging off?

Failing that, a poor connection to the sensor heater is a possibility, or a failed sensor itself. (measure the resistance across the heater pins of the sensor - could be the heater has gone open circuit and the sensor is not getting hot enough to work).

Kevin


Kevin