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T100
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Check Engine Light Due to Restricted EGR System on Toyota T100

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: 203,000 (203,000–203,000)
6 model years affected: 1993, 1994, 1995, 1996, more1997, 1998
11 people reported this problem
Comments
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Code P9402 excessive flow. Runs amazing at first then the CEL comes on and the same code all the time. All new vacuum hoses but I suspect the VSV might be the problem.