P1177 Possible Causes
- Faulty O2 sensor
- Faulty MAF sensor
- Engine vacuum leak
- Lean air/fuel ratio
How to Fix Code P1177?
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 engine service warning light soon)
P1177 Meaning
O2 correction behind B1 catalyst limit reached is the generic description for code P1177, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about OBDII code P1177.