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ka1: Check Validity of KOER 34
Steps _Remove the vacuum delay valve installed in the EGR system during the recall.
_Rerun the Key On Engine Running Self-Test and record all codes generated
Result Was KOER 34 output again?
Direction YES

The initial KOER 34 was a valid trouble code. Reinstall the vacuum delay valve. GO to Continue

NO

The initial KOER 34 was due to the authorized modification. Service is complete. Reinstall the vacuum delay valve.

Notes The Turbocharged Thunderbird and Cougar have been involved in a recall campaign that added a vacuum delay valve in the EGR valve vacuum line. The valve may cause a KOER 34 to be output during self-test. This test step determines if KOER 34 is due to the authorized modification.