On my wife's Aveo LT Sedan, the engine studdors and the gas pedal becomes non-responsive. You could put it to the floor and the RPM's, if in Park, go up to 2500 or so. If in gear the car Slowly gets up to around 10 MPH. If I shut the car off and restart it goes back to normal. I have scanned it before and the only code I get was something about Bank 1 O2 sensor. Can't remember Code number. Can O2 cause this problem or do I have two seperate issues?
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2008 Chevrolet Aveo Question: Throttle is non-responsive
Answer #1DaveJHM March 06, 2011, 13:55Master
Sounds like a fuel control issue. Either a lack of fuel pressure, or even possibly an exhaust restriction due to something moving in the catalytic converter and intermittently blocking exhaust flow.
Answer #2techlund1 from Cottman Transmission and Total Auto Care, March 07, 2011, 05:26Technician
This car uses electronic throttle controls. This is a common symptom of failure of the throttle body. If was a bad catalyst this would happen all the time. Your problem sounds more intermittent
ReplyJpawlowski, March 08, 2011, 21:21Rookie
Yes it is an intermittent issue. I am wondering if a bad O2 sensor would cause this problem. The idle is REALLY rough when it does this. Yes I do know about the throttle being Fly-By-Wire. I am some what knowledgable in automotive issues, just some of the newer computer things that I can't test is my problem. I do have an OBD II scanner and the only issue that comes up is a bad O2 on bank 1.
Answer #3wkid September 07, 2014, 19:30Enthusiast
Another thought is that the o2 code is a response to the ignition causing a misfire on several cylinders at once.
Causing a huge spike in the o2 readings high , or lean , which is a false o2.Is there a backfire ? If so it is ignition , no misfire, it is fuel related check the fuel pressure, if okay then it is most likely in the feedback loop of the engine controls for the fuel control.Perhaps a shorting injector?
Another longshot is a voltage track on the senor wiring causing a higher than normal voltage to be read on that line , contaminated connector , missing seals , or a combination.
You will need to access the wiring diagrams for the circuits in question to accurately diagnose the possibilities.