Where is the location of the radiator cap on a 2001 holden astra

SOURCE: where is the radiator cap located on 2001 Saturn SW2?

Your system does not have a cap on the radiator. It is a 'sealed system' with the reservoir holding pressure. This is not so much an 'overflow' tank like some systems, but an expansion tank.

You can add the stop leak directly into the tank.

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SOURCE: where is the radiator cap located on the 2001

A 2001 Ford Focus does not have an outlet on the radiator for a cap. It has a de-gas type cooling system and what would traditionally be called a "radiator cap" has become the de-gas bottle cap. It is located on the de-gas bottle just in front of the passenger strut tower and behind the passenger headlamp assembly. Do not open this cap when the engine is hot as you may be burned by the coolant.

SOURCE: I have a Holden Astra 2001 with the emissions

try a simple diy job of replaceing the lambda probe (in between the exhaust manifold and the first box on the exhaust pipe).a quickfit type exhaust centre will do it in mins..

SOURCE: 2001 Holden Astra, engine icon appears on

Hello and welcome to Fixya!
You may just need a maintenance check, like an oil change. Try it and observe how it goes. Try to remove the positive battery connector too, let it sit for atleast 5mins. then reconnect it. This can reset the car's computer and get rid of the check engine light.
Hope this helps and thank you for using Fixya! Have a good one!