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

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.

What is the code for service engine soon?

In this mode, the computer will display a Code 12, three consecutive times, by flashing the “CHECK ENGINE”, “SERVICE ENGINE SOON” or “MALFUNCTION INDICATOR LAMP” or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession. 2.

Why is my service engine soon light flashing?

Although it’s a bad sign when the service engine soon light flashes, when one of these codes comes up with it (and nothing else), it’s almost always one spark plug or ignition coil. There can be other reasons this code is thrown, you can see more by clicking on the P0301 link above.

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

What to do if your Chevy engine light is blinking?

The easiest course of action is to bring your car over to the Service Department at Larry H Miller Chevrolet for one of our certified technicians to investigate the diagnostic code and isolate the cause.

In this mode, the computer will display a Code 12, three consecutive times, by flashing the “CHECK ENGINE”, “SERVICE ENGINE SOON” or “MALFUNCTION INDICATOR LAMP” or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession. 2.

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.

Are there any problems with the 2004 Chevrolet TrailBlazer?

CarComplaints.com Notes: It would be ill-advised to blaze any trails with the 2004 Trailblazer. Its faulty fuel gauge could leave you stranded. This data is from the NHTSA — the US gov’t agency tasked with vehicle safety.

Why does my Chevy Trailblazer make a knocking noise?

The vehicle was taken to the dealer for diagnostics. The technician advised that the knocking noise was normal for the type of engine in the vehicle. The vehicle was then taken to an independent mechanic who advised the contact that the pistons in the engine were down sized, causing the noise. The vehicle was not repaired.

CarComplaints.com Notes: It would be ill-advised to blaze any trails with the 2004 Trailblazer. Its faulty fuel gauge could leave you stranded. This data is from the NHTSA — the US gov’t agency tasked with vehicle safety.

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.

The vehicle was taken to the dealer for diagnostics. The technician advised that the knocking noise was normal for the type of engine in the vehicle. The vehicle was then taken to an independent mechanic who advised the contact that the pistons in the engine were down sized, causing the noise. The vehicle was not repaired.