car chugging code p0402 - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 4 (permalink) Old 01-10-2004, 05:29 PM Thread Starter
 
Join Date: Jul 2002
Posts: 192
car chugging code p0402

Recently my car has been really sluggish especially when i get on the gas. this is usually observed best when the car has warmed up. The check engine light went on two days ago and i rented a obd 2 scanner and got code p0402. I have had this code pop up before and resent the computer and it is back now about 6 months later. Just curious if that code could be causing my car to chug and loose power the acceleration is not smooth at all. Thanks for any input...
chris is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 01-10-2004, 07:37 PM
Trumpeter Extraordinaire
 
IronChopz's Avatar
 
Join Date: Jul 2002
Location: Saturn (or SE Michigan)
Age: 57
Posts: 2,916
That code has caused "chugging" with my car in the past, though it was more at idle than acceleration. Were there any other codes? Here's some info from the 1994 PC/ED manual about that code:

HE20 DTC 0402: CHECK FOR EGR FLOW AT IDLE WITH EGR VACUUM HOSE DISCONNECTED

Diagnostic Trouble Code (DTC) 0402 indicates that self-test has detected EGR flow at idle.

NOTE:
If DTC 1405 is in Continuous Memory, diagnose that first starting with «HE50».

Possible Causes:

-- EGR valve stuck open.

-- EVR solenoid vent plugged or iced.

-- EVR circuit shorted to GND.

-- Improper vacuum hose connection.

-- Plugged/pinched EGR vacuum hose.

-- Damaged EVR solenoid.

-- Damaged PCM.

I had that code a while back. I replaced the EGR valve and EVR solenoid. The idle improved, and no more code....part #1 in the following picture is the solenoid.


Last edited by IronChopz; 01-10-2004 at 07:45 PM.
IronChopz is offline  
post #3 of 4 (permalink) Old 01-12-2004, 02:25 PM Thread Starter
 
Join Date: Jul 2002
Posts: 192
The chugging is also on take off and going up hills. i can feel it its like the car just doesn't have enough power or something. i was thinking it might be the transmission going south but i don't know what that would feel like it seems to shift alright. i tried putting some fuel injector cleaner in there for the hell of it but that doesn't seem to help any. Ther is only a mild stumble at idle and its only once in a while. could it be the tps sensor going bad?
chris is offline  
Sponsored Links
Advertisement
 
post #4 of 4 (permalink) Old 01-16-2004, 01:45 AM
PostWhore
 
Join Date: Nov 2002
Location: SouthEastern PA
Posts: 1,112
You might have bad spark plug wires which are leaking spark, although that would not explain the code. Actually, there are many sensors which could cause a similar problem, but I'm not too knowledgeable about the 4.6, so I will defer to others here.

-------------------

Steve

Owner, 1990 Thunderbird SC, white w/ gray cloth
S_Mazza is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome