O2 Sensor Negative Current Control Circuit/Open (Bank 1 Sensor 2)
The negative (sinking) side of the O2 sensor pumping current control circuit on bank 1 sensor 2 is open.
Affected components
- Oxygen sensor
Common causes
- High likelihood: Open negative current line
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
Possible symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.