Code 52 and/or 72
WARNING: This page is about a different car, the 1988 Buick Riviera and 1988 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
Go to Chart A10 If no trouble is found while performing tests on Chart A10, do not go to chart F Instead go to Chart G Solenoid Valves. Perform solenoid valve test for right front valves. If no trouble is found, replace ECBM.