Problem in emission system-- Have vehicle scanned to determine the problem
With a scan tool.
No
I had all sensors replaced in my 03 Trailblazer and the check engine light stiil comes on. Why?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
In US it says "SERVICE ENGINE SOON" in Canada it looks like an engine.
The check engine light sets a code for diagnostics and you need a code reader. Most auto parts stores sell code readers and most will check the codes for free.
How do I reset the service engine light on a 2003 Chevy Trailblazer?
There are many reasons why a check engine light could come on and shut a Trailblazer off. It could be the fuel pump or the oil pump. A mechanic will be able to run diagnostic tests to figure out the problem.
I think you are talking about the secondary air check valve. Come to our enthusiasts forum and post your question there with the trouble code (Pxxxx) www.trailvoy.com All the Answers for your Trailblazer
If you don't have a code reader you can disconnect the battery cable for a couple of minutes and that will reset the light
The diagnostic code 410, on your 2004 Chevrolet trailblazer, is a reference to a vacuum hose problem. Check the vacuum hoses to make sure they are all connected.