2003 Vauxhall Omega Sedan emission

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Condition	Value

expand_moreDiesel exhaust gas values

expand_moreCut-off control speed


All Vauxhall diesel straight-6 2.5 L Y 25 DT engines	4450–4750 rpm4450–4750 rpm4450–4750 rpm
All other modifications	4900–5100 rpm4900–5100 rpm4900–5100 rpm

expand_moreMaximum K-value


All Vauxhall diesel straight-6 2.5 L Y 25 DT engines	2 1/m2 1/m2 1/m
All other modifications	1.7 1/m1.7 1/m1.7 1/m

expand_moreGeneral exhaust gas values


Diagnostic socket location	The diagnostic socket is at the lower edge of the dashboard on the driver's side.

expand_moreIdling speed with automatic gearbox


All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	805–1025 rpm805–1025 rpm805–1025 rpm
All Vauxhall diesel straight-6 2.5 L Y 25 DT engines	750–910 rpm750–910 rpm750–910 rpm
All Vauxhall gasoline V6 2.6 L Y 26 SE engines	580–800 rpm580–800 rpm580–800 rpm
All Vauxhall gasoline V6 3.2 L Y 32 SE engines	580–800 rpm580–800 rpm580–800 rpm
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	805–1025 rpm805–1025 rpm805–1025 rpm

expand_moreIdling speed with manual gearbox


All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	730–950 rpm730–950 rpm730–950 rpm
All Vauxhall diesel straight-6 2.5 L Y 25 DT engines	750–910 rpm750–910 rpm750–910 rpm
All Vauxhall gasoline V6 2.6 L Y 26 SE engines	580–800 rpm580–800 rpm580–800 rpm
All Vauxhall gasoline V6 3.2 L Y 32 SE engines	580–800 rpm580–800 rpm580–800 rpm
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	730–950 rpm730–950 rpm730–950 rpm


Minimum engine oil temperature at VET	176°F176°F80°C

expand_morePetrol exhaust gas values

expand_moreCO content at idling speed


All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	0.4 %0.4 %0.4 %
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
All Vauxhall gasoline V6 2.6 L Y 26 SE engines	0.3 %0.3 %0.3 %
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	0.4 %0.4 %0.4 %
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
All other modifications	0.5 %0.5 %0.5 %
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.


CO content at increased idling speed	0.3 %0.3 %0.3 %
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
Increased idling speed	2800–3200 rpm2800–3200 rpm2800–3200 rpm
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
Lambda sensor design	Jump type lambda sensor
Lambda value	0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ
Maximum HC content at idling	100 ppm100 ppm100 ppm
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.

expand_moreTest speed for lambda sensor signal


All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	730–950 rpm730–950 rpm730–950 rpm
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
All Vauxhall gasoline V6 2.6 L Y 26 SE engines	580–800 rpm580–800 rpm580–800 rpm
All Vauxhall gasoline V6 3.2 L Y 32 SE engines	580–800 rpm580–800 rpm580–800 rpm
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	730–950 rpm730–950 rpm730–950 rpm
For automatic gearboxes starting from model year 2001, the transmission control unit must be updated before carrying out the first exhaust gas test.


Voltage swing at test speed	0.3–0.6 V0.3–0.6 V0.3–0.6 V

To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by Vauxhall.

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 Vauxhall Omega Sedan user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Vauxhall warranty policy for your region. In some regions DIY service may invalidate your warranty.

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Vauxhall Omega Sedan service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 2003 Vauxhall Omega Sedan you're not only saving money, but also also improving your technical skills and learning something new.

2003 Vauxhall Omega Sedan First generation facelift (MK1) Emission

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Conquer your fears and never give up!

Vauxhall Omega Sedan First generation facelift (MK1) model years

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