P0844 Buick Transmission Fluid Pressure Sensor / Switch A Circuit Intermittent

P0845 Buick Transmission Fluid Pressure Sensor B

Possible causes
– Transmission Fluid Pressure Sensor B harness is open or shorted
– Transmission Fluid Pressure Sensor B poor electrical connection
– Faulty Transmission Fluid Pressure Sensor B
– Transmission Valve Bosy
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0845 Buick Description

The transmission fluid pressure sensor B (primary pressure sensor) detects primary pressure of Continuously Variable Transmission (CVT) and sends Transmission Control Module (TCM) the signal.

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