car acting strange?
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car acting strange?
My car is a 2002 civic ex coupe 1.7 vtec sohc.
So in the winter time during those amazing winter vortexs that gave us much snow....my 02 sensor bank 2 went becuase got a slice in the wire. So replaced that soon after that my bank 1 went off so i replaced that (before doing so though i tried to run some cleaner through the fuel system using CRC Guarantee to pass emission test) and the CEL light is still on...now weirdly the car does this weird thing when i start it and push a little on the gas it will shift to 2nd gear (sometimes i think) and than the rpms will drop down and the car will start to coast and kind of "jerk" a little than kick back in and go...as if the engine cuts out or something and than figures it's self out. my cel light has been going off and on and it came back on when it did this when i was pulling out of a parking spot in wal mart parking lot.
The Rpms sometimes don't drop all the way down but go to low idle. I have replaced my throttle body with a used one but in great condition one because I did the isssue where my car went into lag mode for a safety issue because of my throttle position sensor. SO what do you think it could be guys? could it be my fuel pressure...fuel filter...fuel pump?
Maybe even my gas cap (causing it not to have good pressure at first because when it does this it does it once until i turn the car off and turn it back on...but it doesn't do it ALL the time) Maybe one of my coil packs for sparks is bad? injectors? I'm wondering if oxygen sensor 1 is detecting and issue with the mixture of fuel/spark and saying it's bad.. OR do you think could be the transmission (i had a bad transmission and had it rebuilt last summer still have a warranty on it till this summer but i was thinking maybe its going into that lag mode type thing becuase can't shift?
So in the winter time during those amazing winter vortexs that gave us much snow....my 02 sensor bank 2 went becuase got a slice in the wire. So replaced that soon after that my bank 1 went off so i replaced that (before doing so though i tried to run some cleaner through the fuel system using CRC Guarantee to pass emission test) and the CEL light is still on...now weirdly the car does this weird thing when i start it and push a little on the gas it will shift to 2nd gear (sometimes i think) and than the rpms will drop down and the car will start to coast and kind of "jerk" a little than kick back in and go...as if the engine cuts out or something and than figures it's self out. my cel light has been going off and on and it came back on when it did this when i was pulling out of a parking spot in wal mart parking lot.
The Rpms sometimes don't drop all the way down but go to low idle. I have replaced my throttle body with a used one but in great condition one because I did the isssue where my car went into lag mode for a safety issue because of my throttle position sensor. SO what do you think it could be guys? could it be my fuel pressure...fuel filter...fuel pump?
Maybe even my gas cap (causing it not to have good pressure at first because when it does this it does it once until i turn the car off and turn it back on...but it doesn't do it ALL the time) Maybe one of my coil packs for sparks is bad? injectors? I'm wondering if oxygen sensor 1 is detecting and issue with the mixture of fuel/spark and saying it's bad.. OR do you think could be the transmission (i had a bad transmission and had it rebuilt last summer still have a warranty on it till this summer but i was thinking maybe its going into that lag mode type thing becuase can't shift?
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This is the code and def of it. I know usually people jump right to bad cat but this code has so many other causes too
http://www.obd-codes.com/p0420
http://www.obd-codes.com/p0420
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