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 Procedures for P0141
O2 Sensor Heater Circuit (Bank 1 Sensor 2) Found 58 OEM service manual procedures.
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
Showing 8 of 58 procedures
OEM Diagnostic Flowchart
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Parts & Tools for This Job
Common parts shoppers buy for P0141 O2 Sensor Heater Circuit (Bank 1, Sensor 2).
Oxygen Sensor
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Catalytic Converter
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EVAP Purge Valve
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Gas Cap
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OBD2 scanner
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Check SpecificationsBattery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Check SpecificationsMultimeter kit
Confirm voltage, continuity, and sensor power with one simple kit.
A meter is the cheapest way to rule out a bad circuit fast.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0141.
OEM Manual Evidence
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Related Symptoms
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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.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-28