civic 2003 random jerking - HondaCivicForum.com


Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 06-12-2015, 11:52 AM
mc00's Avatar
HCF Member
Thread Starter
 
Join Date: Oct 2009
Location: Mesquite,tx
Posts: 46
Default civic 2003 random jerking

hello,
I did my own timing belt and car drove fine until other day I was doing 70+ my engine light pop on and gave me p0420 and ever since been doing random jerking usually above 60+ mph and sometime after warm start up usually on hot days but it depends like last night it did twice. I already change my spark plug(NGK), i did oil change and coolant levels look normal what else can I check?

Last edited by mc00; 06-12-2015 at 11:55 AM.
Reply With Quote
  #2  
Old 06-13-2015, 12:55 AM
HCF Member
 
Join Date: May 2013
Posts: 722
Default

kay you got the code now google it.
Reply With Quote
  #3  
Old 06-14-2015, 01:02 PM
mc00's Avatar
HCF Member
Thread Starter
 
Join Date: Oct 2009
Location: Mesquite,tx
Posts: 46
Default

Quote:
Originally Posted by itburnswhenIP View Post
kay you got the code now google it.
It the same code I had over month now and comes on and off
"P0420 Catalyst System Efficiency Below Threshold (Bank 1)"
Never gave me the random jerking even the code was on
Reply With Quote
  #4  
Old 06-18-2015, 08:20 PM
HCF Member
 
Join Date: May 2013
Posts: 722
Default

p0420 bank 1 means that either the primary upstream oxygen sensor is bad or the catalytic converter is bad. the primary oxygen sensor controls the air/fuel ratio of the engine so it definitely could be related. also driving around with a bad primary oxygen sensor can clog and destroy your catalytic converter because of the car running rich on fuel and that would definitely cause your problem. so im guessing that both your oxygen sensor and catalytic converter are bad because you did not replace the sensor when it warned you to do so. catalytic converters are extremely expensive $500-$1,200 dollars the oxygen sensor $100-$300 dollars.

Last edited by itburnswhenIP; 06-18-2015 at 08:27 PM.
Reply With Quote
  #5  
Old 06-30-2015, 11:48 AM
mc00's Avatar
HCF Member
Thread Starter
 
Join Date: Oct 2009
Location: Mesquite,tx
Posts: 46
Default

Well someone suggested unplugged the o2 sensors and reset the ecu so can default to fuel trim and relearn idle and drive the car around for few days and see if still does it. I did the test and doesn't do it as often goes days without doing it but when does jerk and usually on hot days is small jerk, like today on way to work it did once and not again, when I had them plugged in the jerking happen more often and random especially on hot days. Is weird thou had the p0420 on for while than goes off for while before jerking/started I had this car for two years now

Last edited by mc00; 06-30-2015 at 02:20 PM.
Reply With Quote
  #6  
Old 06-30-2015, 06:39 PM
HCF Member
 
Join Date: May 2013
Posts: 722
Default

you can't drive around with your oxygen sensors disconnected and expect the car to fix itself thats the dumbest s hit i have ever heard then on top of that you reset the ecu so now its really going to be fuked up. the primary sensor regulates how much fuel and air to send to the engine in order to run properly then you reset the idle and fuel trims so now its super fuked. what you need to do is order new oxygen sensors install them and reset the ecu again perform a proper idle re-learn and pray you didn't *** up your cat converter for neglecting your cars maintenance. replace the dam sensors there's no ifs,ands,or buts about this.

Last edited by itburnswhenIP; 06-30-2015 at 06:46 PM.
Reply With Quote
  #7  
Old 07-01-2015, 10:13 AM
mc00's Avatar
HCF Member
Thread Starter
 
Join Date: Oct 2009
Location: Mesquite,tx
Posts: 46
Default

Right. I gotta get new cat so I'm replacing whole **** anyways.
Reply With Quote
  #8  
Old 07-01-2015, 11:16 PM
HCF Member
 
Join Date: May 2013
Posts: 722
Default

just replace the primary oxygen sensor and see what happens only use i repeat ''ONLY'' use DENSO or NTK oxygen sensors.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
95 honda civic ex tranny jerking ashcheerit2000 Mechanical Problems & Technical Chat 14 10-24-2008 10:12 AM
Car Jerking Omzy Mechanical Problems & Technical Chat 2 04-10-2008 12:18 PM
Car Jerking Please Help!!! zerovisibility Mechanical Problems & Technical Chat 7 03-22-2007 08:06 PM
Idle/jerking/shuts off t34me ECU Tuning & Fuel Management 7 11-21-2006 06:50 PM
kid gets caught jerking it to world of warcraft andryuha Pics and Videos 22 03-26-2006 12:30 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors

All times are GMT -8. The time now is 11:01 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.