The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperature sensor it will trigger a Check Engine Light for improper EGR flow. The repair is to clean out the EGR passages and the EGR Temperature sensor. Our technicians tell this repair is pretty straight forward and takes about 1-1.5 hours. It is also wise to verify the EGR system components i.e. the Transducer, EGR Valve and VSV Solenoid at this time.Google+
Car Problem Reports
Toyota Camry Failed Emissions Test Due to Blocked EGR System
Toyota Camry Problem
Average Mileage: 148,535 mi (15,000 mi - 300,000 mi)
Visitor, 1995 Toyota Camry, 252,000 mi
First cleaned EGR Valve twice...then after that no longer worked I went to mechanic and replaced EGR Valve and after 2 miles of driving Check Engine light would come back on....went to dealer then and they replaced the EGR sensor...and never came back on again.
Visitor, 2001 Toyota Camry, 189,108 mi
vacuum control valve 90910-12199 $63.99 +engine mount 123636-74130 $56.60 + labor total cost $203.21
engine lite comes on--mechanic says it's the egr---passed smog test 3 months ago....mechanic did pressure test and
it tested ok, so he reset engine lite, it was off for about an hour then engine lite went back on...not sure what to do now ???
Check Engine light came up due to failed EGR vacum control valve. Fixed for $80 part and $80 labor.
check engine light came on, this was the issue
car dead; egr 71 signal with check engine light
Visitor, 1991 Toyota Camry, 240,000 mi
This was exactly my problem with my 91 4-cyk Camry - the emission tech was a little too quick to change the catalytic converter and NOx was still over the limit. I took it home, cleaned the EGR tube which was blocked nearly the entire length (the carbon is cement-like) and the car dropped way below the NOx limit. Had to replace the gasket where the tube meets the manifold.
Visitor, 1991 Toyota Camry, 191,000 mi
failed smog test and tune-up failed to fix problem of high emission gases...need to replace EGR and check rest of intake for carbon deposits.
Visitor, 1994 Toyota Camry, 300,000 mi
Check Engine light,EGR temp. sensor code
Visitor, 1990 Toyota Camry, 125,000 mi
did not fail emissions test, but the "check engine" light went on and stayed on until my mechanic diagnosed the problem
--simple and inexpensive fix