Engine & Internal Chat about beefing up your engine's insides here.

Blocked exhaust?

  #1  
Old 03-23-2017, 12:08 PM
Junior Member
Thread Starter
Join Date: Mar 2017
Posts: 3
Default Blocked exhaust?

Hi, I have a '99 Camry with a p0401. I manually pushed up the diaphragm on the egr valve, and the motor stalled. From what I read, that indicates the egr ports aren't plugged. I also noticed a couple exhaust leaks, one from the manifold/header gasket, and the other in back of the engine that I haven't pinpointed yet. I checked the tailpipe, and seem to be getting some pressure back there, so I was a little stumped. Any ideas?
 
  #2  
Old 03-23-2017, 02:47 PM
Senior Member
Join Date: Jan 2014
Location: Ipswich QLD australia
Posts: 543
Default

egr is a stepper type motor opens and shuts
see if the egr can be cleaned or replace the egr


The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. Read more how the EGR system works below.


Toyota Camry/Corolla: In Toyota Camry with the 2.2L engine, the code P0401 was often caused by a bad VSV (Vacuum Switching Valve) for the EGR, located under the intake at the back of the engine. In many cases, replacing this valve could solve the problem, however the EGR passages need to be checked for restrictions and carbon buildup and the EGR valve needs to be checked for sticking. This article describes the repair procedure.
- A faulty VSV (Vacuum Switching Valve) for the EGR can also cause the code P0401 in older Toyota Corolla.


source
OBD II code P0401 Exhaust EGR Flow Insufficient
 
  #3  
Old 04-03-2017, 08:21 AM
Junior Member
Thread Starter
Join Date: Mar 2017
Posts: 3
Default

As an update. I was trying to take the egr valve off of the exhaust line, and of course the two bolts broke off. Anyway, I put it back together without a tight seal, and the code cleared. I'm figuring a plugged cat. I tried drilling a hole in front of cat and spraying carb cleaner. Yesterday I drilled out the two bolts(tricky with the soft aluminum around the bolt). Next step, tighten it up and see if code comes back. in meantime, I ran into drive train issue. Always something.
 
  #4  
Old 04-03-2017, 05:37 PM
Super Moderator
Join Date: Jan 2008
Location: PTW
Posts: 11,742
Default

The code can do to other issues besides a plugged EGR port. Bad VSV, EGR modulator, vacuum hose issues.

What makes you think there is problem other then the P0401 code?
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dan_Lemur
Headers, Intake, & Exhaust
12
07-03-2007 05:32 AM
Dan_Lemur
Headers, Intake, & Exhaust
4
03-11-2006 05:26 AM
gthegreek
Headers, Intake, & Exhaust
0
12-18-2005 04:57 AM
landshark
General Tech
0
11-11-2005 08:59 PM


Thread Tools
Search this Thread
Quick Reply: Blocked exhaust?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.