Your 2000 beetle has just failed its mot for emisions the garage computer says oxygen sensor 1 is faulty you have replaced this and it is still failing the test could the airmass unit be faulty or cat?
I had this problem, went to 3 different shops, replaced 2 o2 sensors, a mass airflow and various other vac tubes, before discovering the terminal was snapped. Check the battery terminals and cables before proceding any further. It may save lots of money.
How do I get a Throttle Position Sensor to work after trying 3 new ones but it still is failing on my 94 Explorer?
There are many potential causes. It may be due to power-saving settings or features on the computer. It could be a failing monitor or monitor cable, or a loose cable. It could be caused by a failing or loose videocard. If there are other problems, such as the computer losing power during these 'black out', refusing to reboot, or other errors, there could be a hardware problem with the computers internals, such as a failing…
A technician has determined that a computer is failing to boot because of a power supply that is not supplying power to the hard drives What is the correct course of action?
You car has leakage (check oil stains under the car) or piston rings are old and have to be replaced, or out of the gaskets inside the engine failed and needs to be replaced, or seals on the valves are failing and have to be replaced. Before to start doing something about that, find out where oil disappears.