SPONSORED LINKS

1999 Toyota Camry Check Engine Light

Tiny
ENDIB
  • MEMBER
  • 1999 TOYOTA CAMRY
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 126,000 MILES
My check engine light is on. The car has no symptoms. The egr valve and the oxygen sensor has been replaced because of obd codes, but car is still reading code 0401-egr flow insufficient. I don't know what else to do. I need the car to pass inspection. Egr port was also checked and cleaned and hoses were checked for leaks.
SPONSORED LINKS
Sunday, October 24th, 2010 AT 6:20 PM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Very common that VSV (vacuum switching valve) allows vacuum to flow all the time even if it clicks EGR will operate all the time and will trigger P0401 Because PCM looks for change in MAP sensor and HO2S from off to on. Easy to test just check for vacuum @EGR valve in Park with Cold engine EGR should not have vacuum. If it has vacuum the EGR VSV is Bad
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, October 24th, 2010 AT 6:25 PM

Please login or register to post a reply.

Related Check Engine Light Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links