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Re: check engine light
P0134O2 Sensor Circuit No Activity
Detected(Bank 1 Sensor 1)
This means that the primary (pre-catalytic converter) oxygen sensor in cylinder bank number 1 is defective. Bank one is the one with cylinder one in it (not sure offhand which that is, but check your spark plug wires and see if they're numbered, or if there is numbering on the distributor cap - if there is, follow the wire labeled as number 1 to see which side of the engine it goes to). That's the side the defective sensor is on, and it'll be the one on that side that is before the catalytic converter. Its responsibility is to tell the ECU what the air/fuel mixture is in the exhaust on that bank of cylinders, so that the fuel mixture can be trimmed correctly. When it fails, you usually see diminished gas mileage, maybe some black smoke out the back of the van, and possibly a little roughness in the idle.
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Arrows pointing down is low coolant. If you
can't read the code because it displays, "communication error", you
have a blown fuse. Your ALDL may be tied in with the auxiliary plug. Look for a
blown fuse and replace it.
came on because of a problem as to which problem there are 100s of codes first check and make sure gas cap is on securely if good then have car scanned most auto stores such as auto zone/advanced auto[check ur local area] offer this service for free the trouble code will give u the area and or component that needs repair or replacement
Check engine light might have came on because of loose gas tank cap, but it's a good idea to read the code and check if it's not something else, you can take your car to an Auto Zone and they read the code for free and tell you the cause also.
But if you want to reset the check engine light, only way is to disconnect the battery terminals and let it set overnight, check engine light will be reset.
Hope it helps and let me know if you need more advice.
Please don't forget to rate the answer it helps with my ratings, thanks!
the check engine light has nothing to do with fluids, please read the tutorrial below. Please read your owners manual.
Why my Check Engine light on? The engine computer or PCM/ECM
Your vehicles computer system has self-testing capability. When the computer senses that there is a problem with one or more of the components it stores the corresponding trouble code(s) in its memory and lights up the "Check Engine" light to tell you that there is a problem and your car needs to be looked at. To properly diagnose what is wrong, you need to take your car to a mechanic or a dealer. The technician at the dealership or a garage will then hook up the scanner to the car computer and retrieve the stored trouble code(s). Then he (she) will look it up in the service manual provided by a car manufacturer. The service manual contains the list of possible codes (about few hundreds) and describes what each code means and what needs to be tested. The code itself doesn't tell exactly what component is defective - it only indicates where to look, what engine parameter is out of normal range. The technician will have to perform further testing to pinpoint a defective part.