P1159 Buick Air/Fuel Ratio Sensor 1 AFS+ Terminal Low Voltage

P1160 Buick Intake Air Temperature Sensor Short To Ground

Possible causes
– Fualty battery
– Faulty Generator/Alternator Control
– Alternator harness is open or shorted
– Alternator circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1160 Buick Description

The Engine Control Module (ECM) has detected a voltage range outside operating limits

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