P0062 — HO2S Heater Control Circuit (Bank 2 Sensor 3)

OBD2 code P0062 flags a problem with the oxygen sensor circuit (HO2S heater control circuit (bank 2 sensor 3)). The car is usually drivable while you plan the repair. Common culprits: damaged sensor wiring or connector, blown sensor heater fuse, ECM signal circuit fault.

powertrain (engine/transmission)

Is it safe to drive?

Usually drivable, but repair promptly P0062 is generally not an immediate stop-driving fault if the engine runs smoothly. Avoid prolonged high-speed driving or towing until the heater circuit is repaired, because incorrect oxygen-sensor feedback can increase emissions, disrupt fuel trims, or damage the catalyst over time.

Typical symptoms

The check-engine light or an emissions warning may illuminate with P0062 stored
P0062 may appear as a pending code during an emissions scan
Rough idle, hesitation, or hesitation during acceleration may occur if oxygen-sensor feedback is affected
Fuel economy may decrease while the engine is correcting for incorrect sensor feedback
A rotten-egg sulfur odor may be present when the engine runs rich
Live oxygen-sensor data may remain unusually flat or fail to show normal rich-to-lean cycling
Some vehicles drive normally and show no symptom other than P0062

Common causes

A failed heater element inside the Bank 2 Sensor 3 HO2S
A blown fuse, defective relay, or missing switched power to the HO2S heater
Corroded or loose connector pins, broken terminals, or damaged wiring in the heater circuit
High resistance in the sensor ground or heater-control circuit
A short to power or ground within the Bank 2 Sensor 3 oxygen sensor
A faulty powertrain control module heater-control driver
Heat damage, contamination, or an exhaust leak that has damaged the HO2S

How to diagnose with an OBD scanner

Confirm P0062 with an OBD scanner Connect an ELM327 adapter with AIScanAuto or another OBD scanner, then read stored, pending, and permanent codes. Confirm that P0062 is present and record its freeze-frame data before clearing it. Review live sensor data, if supported, to document the condition at the time the fault was detected.
Locate the specified HO2S Use the VIN-specific wiring diagram to identify the Bank 2 Sensor 3 HO2S, because sensor numbering and physical positions can differ. Inspect the connector, harness routing, and nearby exhaust components for corrosion, heat damage, pin damage, or a broken wire.
Check heater power, ground, and protection Check the applicable fuse, relay, and switched supply with the ignition on. Back-probe the HO2S heater connector to verify both power and ground against service-manual limits, including voltage-drop testing on the ground side. Do not assume a universal wire color or connector layout.
Test heater resistance and continuity Perform the manufacturer-specified continuity or resistance test for the heater element and wiring. An open circuit or out-of-spec resistance indicates a damaged circuit or sensor; a short to power or ground identifies a failed component or damaged harness that must be located before replacement.
Repair the circuit or replace the sensor Repair damaged wiring, terminals, grounds, or fuse-feed components and restore the connector seal. If the Bank 2 Sensor 3 HO2S fails the electrical test, replace it with the correct heated sensor. Also correct any exhaust leak or contamination source that could damage the replacement.
Verify the P0062 repair Use the OBD scanner to clear the repaired code, perform the required drive cycle, and rescan for P0062. Confirm that the heater-control fault does not return and that live oxygen-sensor behavior is normal. Keep the scan report with the repair documentation for emissions inspection.

Approximate repair cost

Typical independent-shop P0062 repair range: $150-$950 USD, depending on whether the fault requires diagnosis, wiring or connector repair, or Bank 2 Sensor 3 HO2S replacement. Figures are estimates and vary by region, labor time, vehicle access, and parts selection.

Common questions

Does P0062 always mean the Bank 2 Sensor 3 oxygen sensor is defective?

No. P0062 identifies the HO2S heater-control circuit, and the sensor is only one part of that circuit. A failed fuse, damaged connector, open harness, poor ground, or control-module driver can produce the same code.

Can I continue driving with P0062?

Usually, yes, if the engine runs smoothly and no separate misfire, fuel-trim, or catalyst warning is active. Arrange prompt diagnosis because continued operation may worsen fuel economy, emissions, and catalyst performance.

Should I replace the oxygen sensor before testing P0062?

Not automatically. Test heater power, ground, fuse protection, connector integrity, and circuit resistance first. Replacing the HO2S without correcting an open supply or damaged wiring can leave P0062 active.

How do I know the P0062 repair is complete?

Clear the code only after completing the repair, then perform the specified drive cycle and rescan the vehicle. P0062 should not return, heater operation should be restored, and live oxygen-sensor data should return to its expected pattern.

A stored P0062 trouble code points to a problem with the heating element inside one specific oxygen sensor on your vehicle. Specifically, this sensor lives on the exhaust side of the engine, after the catalytic converter, on the bank of cylinders that does not include cylinder one. The heated oxygen sensor (HO2S) at this location plays a critical role in your emissions system — it monitors oxygen levels in the exhaust stream and helps the engine computer fine-tune the air-fuel mixture after the catalytic converter does its work.

Unlike simpler sensor issues that trigger on a single bad reading, the engine control module requires multiple failed checks before lighting up the check engine lamp for P0062. The module watches the heater circuit's performance under specific temperature and load conditions. When it detects that the heater is drawing too much current, too little current, or fails to reach operating temperature within the expected window, it logs this code. The freeze frame data stored alongside P0062 reveals engine load, RPM, coolant temperature, and vehicle speed at the moment the fault was recorded — use that snapshot to reproduce the failure condition during diagnosis.

Understanding sensor position matters enormously here. Bank two is the cylinder bank opposite cylinder one (consult your service manual for the exact orientation on your engine). Sensor three is the third oxygen sensor in that bank's exhaust path, which means it sits downstream of the catalytic converter. Confusing bank one with bank two or mixing up an upstream sensor for the downstream unit leads to wasted money and unfixed vehicles. Verify the physical location on your specific make and model before touching any parts.

When the heater circuit in bank two sensor three stops working properly, the sensor cannot reach its operating temperature quickly or maintain it consistently. A cold oxygen sensor responds sluggishly and produces unreliable voltage signals. The engine computer notices the abnormal readings and switches to an open-loop fuel strategy designed for limp-home operation. That default mode keeps the engine running, but it sacrifices drivability, fuel economy, and emissions performance.

Symptoms of P0062

The check engine light illuminates and stays on
The vehicle fails mandatory emissions testing due to elevated exhaust readings
The engine idles roughly or stalls intermittently
Acceleration feels sluggish and the throttle response lacks its usual crispness
Fuel economy drops noticeably compared to normal driving patterns
In some vehicles, the engine may stumble or misfire under load

Common Causes

A blown fuse protecting the oxygen sensor heater circuit
Damaged wiring or corroded connectors in the sensor harness
A failed or worn-out heated oxygen sensor
An exhaust leak occurring near the sensor mounting location
ECM software issues affecting the heater control signal
Oil or coolant contamination coating the sensor's sensing element

How to Diagnose P0062

Connect a quality OBD2 scanner and confirm P0062 is actively stored (not just a pending code). Record the freeze frame data immediately — this information shows you exactly what engine conditions triggered the fault.
Pull all stored codes, not just P0062. Related codes often expose the underlying cause. Check manufacturer TSB databases for your specific make, model, and model year — factory technical service bulletins sometimes document known failures or offer software updates that resolve sensor heater issues.
Perform a thorough visual inspection of the bank two sensor three wiring harness. Look for cracked insulation, wire chafing from heat or rubbing, corrosion at the connector pins, and verify the connector seats securely. Many heater circuit failures trace back to damaged wires or loose connections rather than a bad sensor.
Using your scanner's live data function, monitor the sensor's voltage activity. A properly functioning downstream sensor shows gradual transitions rather than the rapid switching of an upstream sensor, but it should still respond to changes in exhaust oxygen content. No activity or flatlined voltage indicates a failed sensor.
Measure the heater element resistance across the sensor's heater pins (with the connector disconnected). Compare the reading to factory specifications — an open circuit or resistance far outside the acceptable range confirms a failed heater. While you are in that area, verify the heater fuse is intact and check the relevant relay operation.
Clear the code and complete a drive cycle that recreates the freeze frame conditions — typically involving moderate loads, specific temperature ranges, and sustained highway-speed cruising. If P0062 returns, you have confirmed the fault is current and not an intermittent glitch.

Repair Options

Wiring harness repairs restore conductivity in damaged circuits without replacing the sensor itself, making this the most cost-effective first approach. Connector pins that are corroded or bent can be cleaned or replaced individually in many cases.

If testing confirms the sensor has failed, replacement becomes necessary. Bank two sensor three is typically easier to access than upstream sensors in many engine configurations, but labor times vary by vehicle design. The part itself costs more than a basic upstream sensor because of the specialized heating element and materials required to survive the harsh post-catalytic environment.

Exhaust leaks near the sensor affect heater circuit performance by introducing false oxygen readings and cooling the sensor tip. Repairing the leak (whether through welding, sealing, or replacing a damaged flex pipe section) often resolves the P0062 code without any sensor replacement.

Cost Breakdown

Parts and labor estimates for P0062 repairs at independent shops (USD):

Wiring harness repair or connector replacement: $80–$250
Oxygen sensor replacement (bank two, downstream): $150–$450
Exhaust leak repair near the sensor: $100–$300

Most P0062 repairs land in the $150–$300 range when a failed sensor is the root cause. Wiring issues or simple connector problems run considerably less. Exhaust repairs vary widely depending on accessibility and whether welding or part replacement is required.

Driving Safety Verdict

P0062 is a low-severity fault that does not leave you stranded. Your vehicle continues operating, but the engine runs in a compensatory mode that increases fuel consumption and raises emissions. Prolonged driving with a malfunctioning downstream sensor allows unmonitored catalytic converter operation, which can eventually lead to converter overheating or damage. Schedule the repair within a reasonable timeframe — a few weeks of normal driving presents minimal risk, but ignoring the code for months invites costlier problems downstream.