P1143 BUICK Possible Causes
- Faulty oxygen sensor, bank 1
- Bank 1 oxygen sensor harness is open or shorted
- Poor electrical connection in oxygen sensor circuit, bank 1
How to Fix P1143 BUICK Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1143 BUICK Meaning
HO2S Bank 1 Sensor 3 Low Voltage is the generic description for Buick P1143 code, but the manufacturer may have a different description for your specific model and vehicle year. Currently, we don’t have more information about OBDII P1143 Buick code.