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.
Check Engine Light Due to Restricted EGR System on Toyota Corolla
Average mileage: 187,117 (90,000–297,000)
33 people reported this problem
9 people shared problem details
1996 Toyota Corolla191,524Visitor
egr restricted flow replaced all components
Engine Code P0401 showed up on my scanner. Just needed to replace the Vacuum Control Module. Cheap and easy. Love my car!
1997 Toyota Corolla204,000Visitor
Cleaned EGR but CEL still on:(
1996 Toyota Corolla133,000Visitor
Egr.code p0401 corolla 97. Change egr vale egr modulatorclean intake still check engine light come back
1997 Toyota Corolla189,000Visitor
EGR is block
1995 Toyota Corolla200,000Visitor
Code 71 EGR Temperature
2004 Toyota Corolla90,000Visitor
I am having toyato corolla 2004 I am suffering a problem at the time when car is stopped or not working for more than 5 to 6 hours there is problem like when we start the car it starts immediately but after half minute engine stoppes and than
1995 Toyota Corolla207,384Visitor
Running just fine, then hopping on the Interstate the Check Engine light came on. I am not aware of any running issues with this car.
1995 Toyota Corolla207,017Visitor
Check engine light turned on. EGR valve completely clogged. Cleaned valve and reset engine light.
My car failed for NOx and the limit was 1072.0 and it failed with 1467.1 so you can see it didn...
Can I assume that if I replace plugs and wires That this will do the trick ? Or should I swap-o...
I put a new egr valve on my car about two months ago and my check engine light is still on. can...
The car started going dead at idle. I cleaned and checked the EGR and the intake mainifold whi...
The Check Engine Light may illuminate due to an evaporative emission (EVAP) system fault. Our t...