What does the Check Engine light mean on a trailblazer?

The check engine light can also, in rare instances, refer to various sensors related to engine performance. After you’ve completed the necessary work on your Trailblazer, you need to know how to reset the check engine light.

How do you reset the fault code on a trailblazer?

Because fault codes are generated and stored on the Trailblazer’s electronic control unit, you’ll need to reset the system; otherwise, the light will stay on. Turn the ignition key to the “II” position. Open the hood of the car, then open the fuse panel cover located in the engine bay.

Why does my check engine light not light up?

If your Check engine light is ON, the easiest way to diagnose this problem is to always check your trouble code memory with an OBD2 scanner. The check engine light will not light up if there is a scheduled service as the service engine soon light.

When does the service engine soon light come on?

Where are the IGN fuses on a trailblazer?

Then, pull the PCM BAT and PCM IGN fuses from the fuse panel. Use the fuse diagram on the underside of the cover to locate these fuses. Wait five minutes and then turn the ignition key to the “off” position. Place the fuses back into the fuse panel, in their proper location. Start your Trailblazer to verify that the check engine light went off.

What is the diagnostic code for a Chevy check engine light?

Remember, these are manufacturer specific codes only. Refer to our Generic OBD II code list for definitions on all other Chevy diagnostic trouble codes. Manufacturer Specific Codes P0342Camshaft Position Sensor A Bank 1 Low Input – Related Information P1031HO2S Heater Current Monitor Control Circuit Sensors 1

How to clear service engine soon light 1990 to 2002 Chevy?

If playback doesn’t begin shortly, try restarting your device. As an Amazon Associate I earn from qualifying purchases. I am a participant in the Amazon Associates Program, an affiliate advertising program designed to provide a means to earn fees by linking to Amazon and affiliated sites.

When does the Check Engine light come on?

The check engine light on your 2003 Trailblazer comes on when regular maintenance is required, or when there is a problem related to the vehicle’s emissions control system. The check engine light can also, in rare instances, refer to various sensors related to engine performance.

Why does the service engine soon light come on?

About over a year or two ago the service engine soon light came on. Since he used to be a mechanic he thought it could be an O2 censor; so he took it in to the Midas in our town and they also believed it was the O2 sensors and they both were replaced. The next day lo-and-behold the service engine soon light comes back on.

What to do when your check engine light goes off?

Wait five minutes and then turn the ignition key to the “off” position. Place the fuses back into the fuse panel, in their proper location. Start your Trailblazer to verify that the check engine light went off. “Chevrolet TrailBlazer, GMC Envoy Repair Manual 2WD & 4WD 2002-2009”; Alan Ahlstrand, Ralph Rendina, John H. Haynes; 2009

Why does my Chevy Trailblazer have a flashing check engine light?

A flashing check engine light is your Chevy Trailblazer’s way of saying “I have a serious problem, don’t ignore me”. Most of the time, that serious problem is a misfire. This flashing light should not be ignored. When your engine is misfiring, it is dumping raw fuel into the exhaust.

Why is the engine light on on my 2003 Chevy Silverado?

I have a 2003 Chevy Silverado with a 6.0 engine and automatic transmission and the engine light came on. I put a scanner on it came up with the code po332B Knock Sensor 2 circuit low frequency. I need to know where the sensors are so I can change them out or check any wiring problems.

What causes a Chevy Trailblazer engine to misfire?

Keeping in mind that any engine needs air, fuel, and spark for ignition, your Chevy Trailblazer’s fuel system can often cause the engine to misfire. It can run too lean or rich. Alternatively, there may not be enough fuel for proper combustion, or the fuel isn’t atomizing properly.

How can I get my Check Engine light back on?

Check your repair manual to find the fuse to the engine control unit. Once you have your check light disappear, using any of the five above-mentioned methods, then you are ready to go.

When did the Chevy Trailblazer have the most problems?

If you’re in the market for a used Chevy Trailblazer, the years with the most problems reported were the 2006 and 2007 with 22 problems each. After that, the 2008 had 19, the 2002 had 15, the 2003, 2005, and 2009 had 14, and the 2004 had 13.

What are the sensors on a Chevy Trailblazer?

The oxygen sensors that are equipped in your Chevy Trailblazer are responsible for monitoring the exhaust to help the ECU determine the correct air/fuel mixture. Of all the sensors equipped in your vehicle, the O2 sensors may have it the hardest.

What does a flashing check engine light mean?

They are not in the car repair diagnostics business, so they have no leverage to do anything other than provide you with the codes and hope that that service may translate into some additional business form them. A flashing check-engine light means damage is being done. It’s a bad idea to drive it when the light is flashing.

Why did my service engine light come back on?

Since he used to be a mechanic he thought it could be an O2 censor; so he took it in to the Midas in our town and they also believed it was the O2 sensors and they both were replaced. The next day lo-and-behold the service engine soon light comes back on.

What causes the Check Engine light to flash?

There will always be trouble codes associated with the check engine light blinking. These trouble codes will be able to tell you where to start hunting down the problem. Here are the most common issues that end up causing the check engine light to flash. But, follow the OBDII codes. A code scanner is cheap .

Where do I find the trouble code on my Chevy?

These are listed in numerical order for easy searching. When retrieving Chevy trouble codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on. 3.