P0062 – HO2S Heater Control Circuit Bank 2 Sensor 3

P0062 is an OBD-II trouble code that points to an electrical problem in the heater circuit of an oxygen sensor, usually the downstream (Bank 2, Sensor 2) sensor. When this heater circuit isn’t working correctly, the sensor warms up slowly and sends poor data to the ECU. That can hurt fuel economy, emissions, and sometimes drivability. In this guide, you’ll learn what P0062 means in plain language, the most common causes, how to diagnose it at home, typical repair costs, and when it’s safe to keep driving.

What Does P0062 Mean?

P0062 stands for “HO2S Heater Control Circuit (Bank 2 Sensor 2).” In simple terms, your ECU has detected an electrical fault in the heater circuit of the oxygen sensor located on bank 2, after the catalytic converter. Bank 2 is the side of the engine that does not contain cylinder 1 on V6, V8, and some flat engines. On 4-cylinder engines, some manufacturers still use “Bank 2” for a second sensor grouping.

The heater inside the O2 sensor helps it reach operating temperature quickly so it can send accurate voltage signals. If the heater circuit is open, shorted, or out of its expected range, the ECU sets P0062 and usually turns on the check engine light.

Quick Reference

• Code: P0062
• Definition: HO2S Heater Control Circuit (Bank 2, Sensor 2)
• Main area: Downstream O2 sensor heater circuit, bank 2
• Common causes: Failed O2 sensor, wiring damage, blown fuse, poor connection
• Severity: Low to moderate (emissions and fuel economy impact)
• Typical fix: Replace O2 sensor and/or repair wiring or fuse

Real-World Example / Field Notes

In the shop, I see P0062 most often on higher-mileage SUVs and trucks where the exhaust system has seen a lot of heat cycles and road salt. A common scenario: the customer comes in with just a check engine light and maybe slightly worse fuel economy, but no major drivability complaint. Scan shows P0062 stored, sometimes with a catalyst efficiency code. Visual inspection usually reveals a cooked or brittle O2 sensor harness near the rear of the catalytic converter, or an original downstream sensor with 120k+ miles on it that has simply aged out.

Symptoms of P0062

• Check engine light on: The MIL/SES light will almost always be illuminated when P0062 is active.
• Increased fuel consumption: The ECU may run a slightly richer mixture, lowering fuel economy.
• Failed emissions test: You may fail an inspection due to stored codes or incomplete readiness monitors.
• Rough cold start: In some vehicles, cold-start fueling is less precise until sensors warm up.
• Poor emissions performance: Higher HC/CO emissions because the ECU can’t fine-tune as well.
• Other O2 or catalyst codes: You might see related codes like P0420, P0430, or other O2 heater codes.
• Occasional hesitation: Mild drivability issues can show up during warm-up, though not always.

Common Causes of P0062

Most Common Causes

• Failed downstream O2 sensor (Bank 2, Sensor 2): The internal heater element burns out or goes open-circuit with age or contamination.
• Damaged sensor wiring or connector: Melted, chafed, or corroded wires near the exhaust or underbody are extremely common.
• Blown O2 heater fuse: Many vehicles power multiple O2 heater circuits through one fuse; if it blows, P0062 can set.
• Poor electrical connection: Loose, corroded, or water-intruded connectors at the sensor or harness side.
• Short to power or ground: Harness touching hot exhaust or sharp edges can short the heater circuit.

Less Common Causes

• Faulty relay (if equipped): Some systems use a relay to feed O2 heater power; an internal failure can drop voltage.
• ECU driver failure: Rare, but the ECU’s internal transistor that controls the heater circuit can fail.
• Aftermarket exhaust modifications: Relocated bungs, extended wiring, or cheap universal sensors can cause heater issues.
• Incorrect replacement sensor: Wrong part number or wrong connector pinout can leave the heater inoperative.
• Severe corrosion: In rust-belt areas, heavy corrosion in underbody harnesses can increase resistance or open the circuit.

Diagnosis: Step-by-Step Guide

To properly diagnose P0062, you’ll want a basic scan tool (preferably one that shows live data and Mode $06), a digital multimeter, a wiring diagram for your vehicle, and good lighting. Penetrating oil and O2 sensor sockets also help if you end up replacing the sensor.

1. Confirm the code and check for companions. Scan the vehicle and note any other O2, heater, or catalyst codes. Clear the codes and see if P0062 returns quickly or only after a full drive cycle.
2. Identify the correct sensor. Locate Bank 2, Sensor 2. This is the downstream sensor on the bank opposite cylinder 1, usually after the catalytic converter. Verify using a service manual or reliable database.
3. Perform a visual inspection. With the vehicle safely raised, inspect the O2 sensor wiring and connector. Look for melted insulation, rubbing on the exhaust, broken clips, or green/white corrosion at the connector.
4. Check heater power supply. With key ON (engine off), back-probe the heater power wire at the sensor connector using a multimeter. You should see battery voltage or close to it. If not, check the appropriate O2 heater fuse and relay.
5. Check heater ground/control side. Using the wiring diagram, test the ground or ECU-controlled side of the heater circuit for continuity to ground or proper switching (depending on design). A high resistance reading can trigger P0062.
6. Measure heater resistance. With the sensor unplugged and cool, measure resistance across the heater pins on the sensor itself. Most heaters are in the 3–20 ohm range. Infinite resistance (OL) usually means a failed heater element.
7. Use scan tool data. Some scan tools show O2 heater status or Mode $06 test results. Check if the Bank 2 Sensor 2 heater test is failing while others pass. Compare warm-up time between Bank 1 and Bank 2 downstream sensors.
8. Wiggle test the harness. While watching live data or heater status, gently move the harness and connectors. If readings flicker or the code sets intermittently, you likely have an internal break or loose connection.
9. Verify ECU output (advanced). If power, ground, wiring, and sensor all test good but P0062 persists, check at the ECU connector for continuity and proper control. At this point, a professional-level scan tool and wiring diagrams are strongly recommended.

Pro tip: If the sensor is original with high mileage and the heater resistance is out of spec, replacing the sensor is usually more cost-effective than spending hours chasing marginal wiring issues, as long as power and ground are confirmed good.

Possible Fixes & Repair Costs

Most P0062 repairs are straightforward once you identify whether the problem is the sensor itself or the wiring/power feed. Costs vary by vehicle, sensor location, and labor rates, but here are typical ranges and what affects them.

• Replace Bank 2, Sensor 2 O2 sensor: Parts $60–$250 (OEM vs aftermarket, simple vs wideband); labor $80–$200 depending on access and rust. Total roughly $140–$450.
• Repair or replace damaged wiring/connector: Small harness repair $50–$150 in labor plus $10–$50 in materials; full sub-harness replacement can run $200–$600.
• Replace O2 heater fuse or relay: Typically $5–$40 in parts, $50–$120 in labor if diagnosis is already done.
• ECU repair or replacement (rare): Used or reman ECU $300–$900 plus programming and labor $150–$300.

Overall, most owners spend between $150 and $500 to fix P0062. Factors that drive cost up include rusted-in sensors, difficult access (tight engine bays, AWD systems), and using genuine OEM sensors instead of aftermarket.

Can I Still Drive With P0062?

In most cases, you can still drive with P0062 without immediate risk of engine damage. The vehicle will usually run and drive normally, especially once warmed up. However, fuel economy can drop, emissions will increase, and you may not pass an emissions or inspection test while the code is active. If other related codes are present, or if you notice rough running, strong fuel smell, or poor performance, you should limit driving and address the issue soon.

What Happens If You Ignore P0062?

If you ignore P0062 long-term, the ECU may run less efficient fuel trims, leading to higher fuel consumption and extra stress on the catalytic converter. Over time, a marginally running engine and rich mixtures can overheat and damage the cat, which is far more expensive than an O2 sensor. You’ll also likely fail emissions tests and keep the check engine light on, masking new problems that may appear.

Last updated: February 13, 2026

Vehicles Commonly Affected by P0062

P0062 can show up on any OBD-II equipped vehicle, but it tends to be more common on certain platforms and in rust-prone areas. You’ll often see this code on:

• GM trucks and SUVs: Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon with V6 and V8 engines.
• Ford and Lincoln models: F-150, Expedition, Explorer, and related SUVs with V6/V8 engines.
• Chrysler, Dodge, Jeep, Ram: 3.6L, 4.7L, 5.7L engines in Ram trucks, Grand Cherokee, Durango, and Charger/300.
• Toyota and Lexus: V6 and V8 models like 4Runner, Tacoma, Tundra, Sequoia, and Lexus SUVs.
• Nissan and Infiniti: VQ-series V6 engines in Pathfinder, Frontier, Xterra, and various Infiniti SUVs.

Any vehicle with dual-bank engines and downstream O2 sensors can set P0062, especially once mileage climbs past 100k and the exhaust system has seen years of heat and corrosion.