Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
1 - 2 of 2 Posts

· Registered
2002 chevy trailblazer_lt
Joined
·
2,164 Posts
A code is the STARTING POINT of troubleshooting not the end point. It does not say a particular part has failed, it merely tells you where to begin your logical investigation into the cause of the issue.

You have done some research by reading others posts that are similar to your issue and that is a start.

You will need to identify the specific code by the actual code number, not just a "code for the TPS".

There are several codes associated with the TPS and each one is different and will involve diifferent diagnostic troubleshooting procedures.

BTW, the fuel tank vapor pressure sensor is generally on TOP of the fuel tank and is often not visible.
 

· Registered
2002 chevy trailblazer_lt
Joined
·
2,164 Posts
Looking briefly at your list of codes I would start by checking live data for the #2 5 volt reference circuit and see if it is stable.

If possible view this circuit voltage while checking out all the 5 volt reference #2 wiring and components. Watch for sudden dropouts of the voltage.

If it is an intermittent short, which seems to be the case here the voltage may read proper at first but road bumps etc may cause a wire with worn insulation to rub a ground point somewhere.
 
1 - 2 of 2 Posts
Top