ENGINE OIL LIFE MONITOR (OPERATION & DIAGNOSTICS). Buick Park Avenue 1992

SUBJECT: ENGINE OIL LIFE MONITOR (OPERATION AND DIAGNOSTICS)

VEHICLES AFFECTED: 1991-93 "C" MODEL, 1992-93 "H" MODEL WITH ENGINE OIL LIFE MONITOR

1991 93 PARK AVENUE, PARK AVENUE ULTRA 1992-93 LESABRE WITH ENGINE OIL LIFE MONITOR

CONDITION:

(a) The "Change Oil Soon" telltale stays on for approximately 60 seconds after turning the key to the run position and then goes out.

(b) The "Change Oil Soon" telltale stays on for the entire time the key is in the run position.

CAUSE:

(a) The Engine Oil Life Monitor has determined that the oil life is more than 90 percent spent and the oil should be changed soon, i.e.: the oil life index is less than 10 percent.

(b) The Engine Oil Life Monitor has registered a problem with either the vehicle system or the module itself. A diagnostic code has been set.

CORRECTION:

(a) The engine oil should be changed and then the Engine Oil Life Monitor should be reset. This is accomplished by putting the key into the run position and pressing the reset button for more than five seconds but less than 60 seconds. The reset button can be accessed through the hole in the hush panel. The engine should not be running.

NOTE: The Engine Oil Life Monitor has no way of knowing that the oil has been changed without being reset.

(b) The codes should be read off the Engine Oil Life Monitor by using a Tech 1 or similar diagnostic tool. The service manual should then be referenced to determine the appropriate action for each diagnostic code.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.