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Check Engine Light Due to Restricted EGR System on Toyota Camry

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 151,278 (15,000–350,000)
14 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2010
64 people reported this problem
Comments
Viewing 1 - 20 of 21 comments
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 ???
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.
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.
vacuum control valve 90910-12199 $63.99 +engine mount 123636-74130 $56.60 + labor total cost $203.21
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
Turned on the car and at first it was fine then all of a sudden very loud knocking. Toyota dealership said it was the EGF and it would have to be replaced because it is clogged. He said I was 10,000 miles past warranty(convenient) and it costs $700. Prius is expensive to repair.
I have a 1990 Camry LE, 6cyl. wagon. Check engine light came on. I checked the diagnostic error code which is 71. The repair shop I use charged me $330 for a VSV valve and $170 for an EGR valve plus $140 for labor. The check engine light is presently out but I have only driven the car home from the shop or about 3 miles. The parts charges seemed high to me but the mechanic showed me one of the replacement parts he ordered and it was a very complex and highly machined piece so the price did not seem unreasonable. Today I checked under the hood but I do not see the two new parts that were supposedly installed. So now I am wondering, was I taken advantage of?!
Check engine would come on and go off and then it just stayed on. I need to go to get my emission test. Before I can go I'm getting the ERG vale replaced.
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.