1994 Toyota Corolla Q&A
1994 Toyota Corolla Question: code 71
Attach a small diameter hose to the EGR port of the ERG valve, suck on the end of the hose with the engine running, the engine idle should get rough and the engine may even stall if the EGR passage ways are clear and the system is working efficiently. Check the tech links at this website (free) http://www.autoshop101.com/ - patrick mannion
I have tried to fix this and asked many people what to do . No answers. I know it's in the egr but where? there are so many things to check.
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 temperat...