P0141
O2 Sensor Heater Circuit (Bank 1, Sensor 2)
Low — drive on, check soonPowertrain (engine & transmission)
System
Powertrain (engine & transmission)
Type
Generic (standardized)
Subsystem
Fuel & air metering
What it means
The heater in the downstream (post-catalyst) oxygen sensor on bank 1 is faulty.
Symptoms
Usually just the check-engine light.
Common causes
Failed downstream sensor heater, fuse or wiring fault.
Recommended action
Check the fuse/wiring; replace the downstream O2 sensor if the heater circuit is open.
Related codes
P0300Random/Multiple Cylinder Misfire DetectedP0301Cylinder 1 Misfire DetectedP0302Cylinder 2 Misfire DetectedP0303Cylinder 3 Misfire DetectedP0304Cylinder 4 Misfire DetectedP0420Catalyst System Efficiency Below Threshold (Bank 1)P0430Catalyst System Efficiency Below Threshold (Bank 2)P0171System Too Lean (Bank 1)P0174System Too Lean (Bank 2)P0172System Too Rich (Bank 1)P0175System Too Rich (Bank 2)P0101Mass Air Flow (MAF) Circuit Range/Performance
FAQ — P0141
What does code P0141 mean?
O2 Sensor Heater Circuit (Bank 1, Sensor 2). The heater in the downstream (post-catalyst) oxygen sensor on bank 1 is faulty.
What are the symptoms of P0141?
Usually just the check-engine light.
What causes P0141?
Failed downstream sensor heater, fuse or wiring fault.
What should I do about P0141?
Check the fuse/wiring; replace the downstream O2 sensor if the heater circuit is open.
General reference based on the SAE J2012 standard. Exact causes for your vehicle may differ — when in doubt, consult a workshop.
← All OBD-II codes