P1869 Buick Transmission Automatic 4-Wheel Drive Indicator (Lamp) Circuit Short To Battery

P1870 Buick Transmission Component Slipping

Possible causes
– Trailer towing may set code
– Check transmission fluid level
– Internal transmission fault
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