P1168 Possible Causes
For 2005 and later models:
- Faulty Air/Fuel Ratio Sensor 1, Bank 2
- Air/Fuel Ratio Sensor 1, Bank 2 harness is open or shorted
- Poor electrical connection in Air/Fuel Ratio Sensor 1, Bank 2 circuit
For pre-2005 models:
- Faulty Heated Oxygen Sensor 1, Bank 2
- Heated Oxygen Sensor 1, Bank 2 harness is open or shorted
- Poor electrical connection in Heated Oxygen Sensor 1, Bank 2 circuit
How to Fix Code P1168?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable 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)
P1168 Meaning
The Engine Control Module (ECM) performs an ON/OFF operation check of the corresponding Air/Fuel (A/F) Ratio Heater/Heated Oxygen Sensor 1 according to the engine operating condition to maintain the Air/Fuel (A/F) Ratio/Heated Oxygen Sensor 1 element temperature within the specified range.