P0141
Low SeverityO2 Sensor Heater Circuit (Bank 1, Sensor 2)
Emissions System
What Does P0141 Mean?
The heater in the downstream O2 sensor on bank 1 has failed.
Common Fix
Replace downstream O2 sensor
Estimated Cost (DIY)
$25 - $80
Common Causes
How to Diagnose P0141
- 1Check O2 heater fuse
- 2Measure heater resistance
- 3Inspect connector
- 4Replace sensor if heater is open
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0141.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Related Symptoms
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Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0141 on this vehicle.
Related Codes
The heater circuit for the downstream (post-cat) O2 sensor on bank 1 has failed. This sensor monitors catalytic converter efficiency.
The heater in the upstream O2 sensor on bank 1 is not working properly. The heater brings the sensor to operating temperature quickly.
Heater failure in downstream O2 sensor bank 2.
Frequently Asked Questions
- Can I just replace the heater?
- No — the heater is integrated into the O2 sensor. You must replace the entire sensor.
- Do I need to replace upstream and downstream together?
- No, replace only the failed sensor. They are independent.
Related Repair Guides
If your vehicle has triggered P0141, these DIY repair guides may help: