P081E Buick Excessive Clutch B Slippage

P0820 Buick Gear Lever X-Y Position Sensor Circuit

Possible causes
– Faulty Gear Lever X-Y Position Sensor
– Gear Lever X-Y Position Sensor harness is open or shorted
– Gear Lever X-Y Position Sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera