97 Pontiac no downshift

jeepguy97

NAXJA Forum User
Location
clearfield, pa
My dad recently had his 97 pontiac bonneville in the shop for an intake manifold gasket replacement. Now the check engine light is on and a fter a drive we found out why. The tranny wont downshift to passing gear. The owners manual says its supposed to come on if there is a emission problem. I beliee the problem is a vaccum prob since the tranny shares vac with the evap system but the hoses are all connected right. Any others suggestions all the wires seemed to be hooked back up.
 
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