Problem Reports
Toyota Corolla
Report: Failed Emissions Test Due to Blocked EGR System
Toyota Corolla Problem
Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
Average Mileage: 153,333 mi (135,000 mi - 175,000 mi)
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.
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hedbngr18, 1996 Toyota Corolla, 150,000 miRookie
Engine Code P0401 showed up on my scanner. Just needed to replace the Vacuum Control Module. Cheap and easy. Love my car!
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