P0141
Low SeverityO2 Sensor Heater Circuit (Bank 1, Sensor 2)
Emissions System
P0141 — Instant Answer
O2 Sensor Heater Circuit (Bank 1, Sensor 2)
Severity: LOW SEVERITY
Meaning: The heater in the downstream O2 sensor on bank 1 has failed.
Safe to drive? Usually yes with caution, but confirm root cause before long trips.
Estimated repair cost: $25 - $80
Most common causes:
- 1. Burned-out heater element (35-45% of cases)
- 2. Blown heater fuse (10-25% of cases)
- 3. Corroded connector (10-25% of cases)
Common Causes
How to Diagnose P0141
- 1Check O2 heater fuse
- 2Measure heater resistance
- 3Inspect connector
- 4Replace sensor if heater is open
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Read live data and freeze frame for P0141 to pinpoint the cause before buying parts.
TopScan
$51.27
DIYers who want phone-based scanning
View on TOPDON
ArtiLink600
$99
DIYers working on ABS/airbag systems
View on TOPDONGot a repair estimate for P0141? Check if the quote is fair before ordering parts.
Turn This Into a Confident Next Step
Verify the likely fault first, then compare a quote before you approve expensive work.
Affiliate disclosure: We may earn a commission at no extra cost to you.
View supporting tool options
OBD2 scanner
Read codes and freeze-frame data before you guess at the fault.
Most diagnostic jobs start with a scan tool and a verified code path.
Shop on Amazon →Battery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Shop on Amazon →Multimeter kit
Confirm voltage, continuity, and sensor power with one simple kit.
A meter is the cheapest way to rule out a bad circuit fast.
Shop on Amazon →Ready to fix it yourself?
Find My Vehicle Repair Guide →Select your exact vehicle for a personalized step-by-step guide
Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0141.
Related Symptoms
Browse →Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0141.
Open the exact vehicle hub for a repair workflow commonly associated with P0141.
Open the exact vehicle hub for a repair workflow commonly associated with P0141.
Open the exact vehicle hub for a repair workflow commonly associated with P0141.
Open the exact vehicle hub for a repair workflow commonly associated with P0141.
Open the exact vehicle hub for a repair workflow commonly associated with P0141.
Exact Repair Workflows
Browse →Open the exact repair flow most commonly associated with P0141 on this vehicle.
Open the exact repair flow most commonly associated with P0141 on this vehicle.
Open the exact repair flow most commonly associated with P0141 on this vehicle.
Open the exact repair flow most commonly associated with P0141 on this vehicle.
Open the exact repair flow most commonly associated with P0141 on this vehicle.
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.
Get the Complete Maintenance Schedule for P0141 drivers
Oil, filters, belts, brakes, and fluid intervals sent to your inbox. Unsubscribe anytime.
Not sure you want to DIY? Compare local shop pricing first.
Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07