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[madmorty]

 :-/ Done Paperclip Test On My Omega 2lt And I Am Getting The Codes
38 -oxygen Sensor Circuit-voltage High And 73-mass Air Flow Temperature-voltage Low, Can Anybody Help Me With This Problem And Where Is The Oxygen Sensor Circuit

[magnul]

I have a feeling that these may be related, and that only one of them is real, but I'll leave the diagnostics to the grown ups.
The oxygen sensor is positioned in the downpipe before the cat. A connector is on the side of the transmission. This circuit is fed with a 5V reference signal from the ECU as well as heating wires. The sensor itself can easily be tested in situ* with a DMM, but can be misleading if the MAF is playing up as well.

*The black wire is the signal wire. When measures vs ground it should fluctuate between ~0.1 and ~4.7V approx one time pr. second.

One of the seniors will probably answer you shortly

[Marks DTM Calib]

I would start by checking for air leaks etc on the inlet system......

[madmorty]

would this problem cause my car to run uneven and spluter and stall

[TheBoy]

would this problem cause my car to run uneven and spluter and stall

Yup

[madmorty]

are there any photos ofthe pipes i need to look at

[Marks DTM Calib]

Also check the EGR is not sticking.

The inlet pipes are the big trunking from the air filter to the throttle housing.

[arthill]

Is it true that where several codes show up the first one on list is the most urgent as some of the others may be as result of first fault, ie. that should be tackled first then re-read?.