How do l locate the sensors on '99/'00 Astra G?

Question

After moving for a few kms a light indicating an emission problems appears on the panel. It's been happening for sometime now. Does it mean the sensor is bad. How do l decode or understand the various signals for bad sensors and where to locate them on the car. Please help.

Answer 1

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Answer 2

You will first need a scan tool to plug into the ECM. This will give you codes to aid in diagnosing the problem. The code is only a guide and not always the cause. There are some diagnostic trees that will lead the technician to the problem.  Unless you are a technician, you may spend more money guessing and replacing parts than you would taking the car in to a qualified tech