How to Fix P1131 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
- Check Engine Light On (or Service Engine Soon Warning Light)
P1131 BUICK Meaning
A Heated Exhaust Oxygen Sensor (HO2S) indicating lean at the end of a test attempts to correct a too rich condition. The test fails when the fuel control system no longer detects switching for a calibrated duration.