I recently had a Test Only Station test my car and every thing passes but the EGR functional test.
The EGR valve functions, it holds position under vacuum test and the EGR solenoid switches on and off with changes in rpm’s.
There are no OBD II trouble codes for EGR or any other system on my scanner.
I am comfortable working on engines, before the test I changed the timing belt, water pump, oil pump, power steering pump, PCV valve, changed oil and filter, and air filters.
I find it odd that the only test failed was a subjective test. Then they were eager to perform repairs to make it pass, plus they offered me papers to get a $500 voucher from the State to help with costs, but said it may no cover the repair fees. I told them no thank you and left.
I am curious to know your comments regarding EGR test.