Buick Lucerne: Engine Power Reduced

Many late model GM-made vehicles, such as the Buick Lucerne use an “Engine Power Reduced” mode when they detect a potentially catastrophic problem. Reduced engine power has been known to come on at very inopportune times (such as while driving on the highway). Many components can cause the engine power to be reduced. The most … Read more

Buick Lucerne P0705: Meaning, Causes, & Diagnosis

P0705 is a very common transmission-related trouble code that can occur in the Buick Lucerne. In layman’s terms, it means that your Lucerne can’t tell what gear you’ve selected, which can have some real consequences on how it drives. It’s most likely caused by a bad Transmission Range Sensor (TRS), but there are other causes … Read more

Buick Lucerne: DRL Warning Light On – Causes + Fix

Daytime running lights (or DRL) are specialized lights that come on when your Buick Lucerne’s regular headlights are turned off. Their purpose is to make it easier for other drivers to see you, theoretically decreasing the odds of getting into an accident. If your Lucerne’s DRL warning light is on, the powertrain control module (commonly … Read more

Buick Lucerne P2279 Code: Meaning, Causes, and Diagnosis

P2279 is a generic OBD-II code. It indicates there is a vacuum leak coming from your Buick Lucerne’s air intake system. While P2279 is a generic code (it has the same definition for the Lucerne as it would any other vehicle made after 1996), repair steps will vary based on model year and engine. The … Read more

Buick Lucerne P0605: Meaning, Causes, + Fix

P0605 is a relatively rare OBD-II trouble code that can occur in the Buick Lucerne. It indicates that PCM (powertrain control module) is not passing its ROM (read-only memory) self-test when you turn the ignition on. While P0605 is a generic code (it has the same meaning for any car or truck), it is most … Read more

Buick Lucerne P0116: Meaning, Causes, + Diagnosis

P0116 indicates that your Buick Lucerne’s engine coolant temperature sensor is sending a signal to the PCM (powertrain control module) that is outside of its normal operating range (in terms of voltage). While P0116 is a generic OBD2 code (it has the same definition for any car or truck), it has the same basic causes … Read more

Buick Lucerne P0117 Code: Meaning, Causes, and Diagnosis

P0117 is a generic OBD2 code.  It indicates that your Buick Lucerne’s PCM (powertrain control module) has detected the signal coming from the engine coolant temp (ECT) sensor has a voltage level below its normal operating range. With the ECT sensor, as the voltage level drops, it will appear that your Lucerne is overheating. While … Read more