Q: The check engine light on for my 2005 Chevrolet Avalanche

asked by on August 12, 2016

My truck has gone around 120,000 miles and the dashboard shows the check engine light illuminated. I had the gas cap reinstalled as it was loose. Also, I had oil level checked and it is fine. The operating temeprature is also okay. There are no issues with the oil pressure either. However, the check engine light is still on. What should I do?

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

Hey there, thanks for writing in about your 2005 Chevrolet Avalanche. If the gas cap was loose but then later taken care of, then the light may be due to another issue. You will need to have the Check Engine Light scanned for codes and cleared of codes. The gas cap code will not clear on its own without clearing it. If you need to have this taken care of for you, a local expert from YourMechanic can come to your car’s location to diagnose the Check Engine Light and resolve this issue.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Shaking noise when the truck idles, worse when it first starts
(Answer assuming it is a 5.4 Triton Engine) This complaint is one of the most common I have heard over and over again for the Ford F-series trucks with the 5.4 Triton engine and covers many other years besides just...
How do I use the remote keyless entry (RKE) system to locate my vehicle?
The remote keyless entry (RKE) transmitter has a vehicle location feature to help you find your car. This system is particularly helpful if your vehicle is in a parking lot or garage surrounded by many other vehicles, and you can’t...
Coolant leak around engine
Hello. There are coolant hoses that run on the side, back, and front of the engine with the coolant circulating throughout. It is possible that a broken hose around the back of the engine is causing it to appear like...
First gear shifting issues - 1999 Isuzu Amigo
Hello. If your vehicle is experiencing shifting issues and has not had the transmission serviced after nearly 100k miles, it may very well be time for a service. Automatic transmissions operate using the fluid pressure to shift automatically. If the...
Instrument cluster shuts off intermittently while driving
There are two fuse boxes on the vehicle. One is inside of the firewall usually located in or around the dashboard. Have you checked this fuse box and the fuse box in the engine compartment? The dash cluster itself may...
Car revs at stop sign, no check engine light
This may be a result of a faulty oxygen sensor reading as a result of your exhaust system (presumably your catalytic converter) not operating effectively. As you may know the oxygen sensors which are part of your emissions system read...
I spilt coffee on my dash were the climate control is and now none of the dials work - climate control is stuck on off but is on
When a liquid like coffee gets into components it will short out the electronics. You will most likely need to replace anything that got coffee spilled on it. You may try to remove the controls at the dealer and have...
STOP fuse blows when I shift out of park.
It sounds like you have a failure in your neutral safety switch. This switch normally prevents the operation of the shifter unless the key is in the on position and the brake pedal is depressed. I would recommend having your...
Turn signals don't work right when I have headlights on but when there off everything works right
If the turn signals and headlights are both activated by the same column-mounted "combination switch" a possibility is there an internal fault with that switch. If the two circuits are not working off the same "combination switch", there is some...

Related articles

P0180 OBD-II Trouble Code: Fuel Temperature Sensor A Circuit Malfunction
Fuel Fuel Temperature Sensor ‘A’ Circuit Malfunction What the P0180 code means P0180 is a generic OBD-II code that is triggered by a malfunctioning fuel temperature sensor 'A.' This could indicate that the sensor is not within specification, or that...
P0651 OBD-II Trouble Code: Sensor Reference Voltage B Circuit Open
P0651 means there is a fault within the sensor reference voltage "B" often due too poor, electrical connection or engine control module.
P0689 OBD-II Trouble Code: ECM/PCM Power Relay Sense Circuit Low
P0689 means that the relay control switch to the PCM is sending a voltage signal that not normal due a defective PCM, battery or electrical issues.