Could be 02 sensor or mass airflow sensor
a human brain is the best.
It is the port, where a diagnostic machine can be hooked up. The diagnostic will read codes from your vehicles computer. For instance if your check engine light comes on, you can plug the diagnostic machine into the data port and it will tell you why the check engine light came on so that you can get it fixed.
how to reset check engine light on 1992 Mazda mpv
changed battery engine light stays on
A non-functioning temperature gauge in a 2005 GMC Yukon Denali could be due to several reasons, including a faulty temperature sending unit, a malfunctioning gauge itself, or issues with the wiring or connections in the dashboard. Additionally, a blown fuse or a problem with the vehicle's engine control module (ECM) might also cause the gauge to fail. It's advisable to perform a diagnostic check to pinpoint the exact cause for accurate repairs.
have an engine diagnostic check at an auto shop to find out what the problem may be.
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.
A flashing check engine light is usually a misfire.
In the computer. If check engine light is on you can get them by plugging a reader into port under dash,.
If no codes (check engine light) or rpm fluctation first check fuel pressure
To reset the check engine light on a 2007 GMC Yukon Denali, you can use an OBD-II scanner to clear the diagnostic trouble codes (DTCs) that triggered the light. Alternatively, you can disconnect the negative battery terminal for about 10-15 minutes, then reconnect it, which will reset the vehicle's computer. However, it's important to address the underlying issue that caused the light to turn on to prevent it from reappearing. If you're unsure, consult a mechanic for a thorough diagnosis.
The check engine light on a Buick Regal can be reset with a special diagnostic scanner. This can be performed at a car dealership or service garage.