- I have a 2010 Honda accord EX-L 2.4l 4cylinder with around 240,000 miles. She’s been well taken care of and has ran like a dream until yesterday when I was driving and the VSA light came on and the throttle started acting funny. When I was driving it would jerk like it downshifted real hard when I’d let off the gas and jerk again when I barely put any pressure back on the pedal. Then when I came to a complete stop the throttle stayed open and kept wanting to move so I had to put it in neutral. When I was in neutral it would rev at around 1k-1,500 rpms. It’s done this before twice. The first time it happened right when I started the car and I just unhooked the battery for a little and it fixed it. Then it did it again a few months later the same way but it reset itself from just turning the car off for a few minutes, this time it hasn’t stopped. I plan on trying to cleans MAF sensor, and IAC valve but wanted a second opinion if it might be something inside the VSA system or the throttle control.
Do you think I should just start replacing the sensors?
Scotty does not usually revisit topics he has already answered.
No, you should not just blindly throw parts at a problem. More diagnosis is needed to determine the fault(s). You can start by looking up the potential causes of the codes you are seeing. Also check freeze-frame data and live data for issues.
I replaced the upstream o2 sensor with an after market OEM one from Amazon
Big mistake. Cheap aftermarket sensors rarely if ever work properly. Install an OEM sensor and see where that leads you.
@chucktobias It should be worth noting that amazon is notorious for selling counterfeit parts.
Well since you disconnect the battery and then it resets itself and doesn't do it for a while. It's some kind of a computer module failure. So it could be the PCM. It could be the throttle pedal actuator. It could be the motor on the throttle. It could be any part of the electronic system. But if you want an educated guess it's often a bad accelerator pedal sensor. You can buy the whole assembly and just bolt it on and off. It's pretty easy to do and that's a good educated guess
@scottykilmer Thank you, it started throwing codes without any problems with the throttle but started misfiring P0135 P0341 P0301 P0302 P0303 P0304 P0300 These are the codes I read. Do you think I should just start replacing the sensors? Also on a side note I replaced the upstream o2 sensor with an after market OEM one from Amazon which might be the cause for the P0135. But also once again when I unplug the battery it resets itself back to normal and which makes me think more electrical then a bad sensor. What are your thoughts? Do you think the accelerator pedal sensor would cause that?