Is the Check Engine light on on my Chevy Silverado?

I started having a rough idle issue with my 2004 Chevrolet Silverado, 5.3L (T), and the check engine light is on. I took it to my local mechanic and he pulled the codes. The scan tool showed an O2 Sensor issue, multiple mis-fires on cylinders 1,3,5,7, and it showed a lean bank.

What causes a check engine light to light up?

Misfires are often caused by a bad spark or a faulty air-fuel mixture. When your engine is misfiring, it will often also light up the check engine light and store trouble codes. Check the trouble codes with an OBD2 Scanner to easier find out which cylinder the misfire appear on.

Where can I find the Check Engine light?

If you want to continue diagnosis, here are some things to read first – P0300 @ OBD-Codes.com; P0300 @ Engine-Light-Help.com; P0300 at RandomMisfire; Good luck! Question: 2001 chevy suburban 2wd 5.3l rough idle/stalling. “check engine soon ” light on. Wanted to know how many oxygen sensors there are and where they are located.

Is it safe to clear a misfire code on a check engine light?

Answer: Hi Matt. Yes, your truck does need attention. When the truck ran out of gas it likely set a misfire code, and possibly other codes. It should be safe to just clear the trouble codes. If any engine light codes return, the truck will need further attention.

Why does the Check Engine light come on?

Check Engine Light comes on, accompanied by any of the above behaviors The throttle position sensor (TPS) is part of your vehicle’s fuel management system and helps ensure that the correct mixture of air and fuel is delivered to your engine.

Why is my GM 4.8l engine running too lean?

The engine may be running too lean, due to a leaking intake manifold. Too lean means too much air and not enough fuel; according to the power control module (PCM) calculation. When the engine is cold, not all sensors function. As the engine warms up the oxygen sensors report the lean condition.