OBD codes / P0062
P0062
ModerateO2 Sensor Heater Control Circuit (Bank 2, Sensor 3)
Drive on without concern — P0062 involves the last, purely-informational sensor in the Bank 2 exhaust and has zero effect on engine operation. Put it on the maintenance list, with your next emissions test as the natural deadline.
What this code means
This is one of the rarer positions in the oxygen-sensor lineup: Sensor 3 on Bank 2 exists only on vehicles that run two catalytic converters in series on the exhaust side opposite cylinder 1 — so the code requires both a V-type or flat engine (for Bank 2 to exist) and a dual-converter exhaust on that bank (for a third sensor to exist). The sensor sits after the second converter and simply verifies that the final stage of exhaust cleanup is working. Its internal heater brings it to operating temperature quickly after start-up so that monitoring doesn't have to wait on exhaust heat; P0062 records that the heater's control circuit is open or unresponsive when the computer commands it. A failed heater element inside the sensor is the most likely story, though the long wiring run to this rearmost sensor gives corrosion, chafing, and debris damage plenty of opportunity, and a blown fuse remains the five-minute check. Nothing changes from the driver's seat — this sensor has no influence on fueling.
Symptoms you might notice
- Check-engine light with completely normal driving
- No performance or fuel-economy impact
- Failed OBD emissions inspection while the code is stored
What it costs to fix
Typical range: $150–$425 · about ~0.5–1.5 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Third (downstream) oxygen sensor | $30–$200 | ~0.5–1.5 hrs |
| Wiring / connector repair | $10–$120 | ~0.5–1.5 hrs |
| Heater-circuit fuse | $1–$10 | ~0.1–0.3 hrs |
The part is normally an affordable downstream-style sensor; position drives the price. Being the farthest-back sensor on its bank, access without a lift can be awkward, and years of heat cycles can seize it in the exhaust bung.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0062 for my exact vehicle →
Frequently asked
Does my car really have a Bank 2, Sensor 3?
Only if it has two cylinder banks and two catalytic converters in series on the Bank 2 side — a layout found on some V6/V8 vehicles with stricter emissions packaging. If the computer set P0062, the sensor exists; follow the Bank 2 exhaust past both converters to find it.
How do I know which side is Bank 2 on my engine?
Bank 2 is whichever cylinder bank does not contain cylinder 1, and cylinder 1's location varies by manufacturer. Consult a cylinder-numbering diagram for your specific engine before touching parts — guessing wrong means replacing a perfectly good sensor on the other side.
Is P0062 worth fixing right away?
There's no mechanical urgency at all; the sensor only audits the second converter. The reasons to fix it are practical: an active code fails emissions testing, and a lit check-engine light can't alert you to the next fault that comes along.
What's the usual culprit behind P0062?
A burned-out heater element inside the sensor — heater failure is how most oxygen sensors end their service life. That said, this sensor's harness makes one of the longest, most exposed runs on the vehicle, so a wiring or connector check is genuinely worthwhile before ordering the part.
Seeing P0062 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0062 for my vehicleRelated trouble codes
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Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.