P0062 code: O2 Sensor Heater Control Circuit (Bank 2, Sensor 3)
P0062 means o2 Sensor Heater Control Circuit (Bank 2, Sensor 3). The code says where to look, not what failed — the fix depends on which cause your car actually has.
What P0062 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.
P0062 symptoms
- 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 P0062
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 →
How to fix P0062
Moderate — doable at home with common tools and patience
- Check that a Bank 2 sensor 3 is actually fitted
This position needs a V or flat engine for Bank 2 to exist and a second converter on that side for a third sensor. Most scan tools list which oxygen sensors the engine computer expects, so check the sensors-present data before crawling under the car, then follow the Bank 2 pipe back past the second converter to the last sensor.
- Look at what else is set
P0062 with P0166 fits a sensor that never warms up and so never switches. P0062 with P0042 or other heater codes points at a shared fuse or feed rather than this sensor. On its own, the code narrows things to this rearmost sensor and its lead.
- Inspect for debris strikes at the back of the exhaust
Being the last sensor on that pipe, it hangs where rocks, ice chunks and curb strikes reach it. Look for a connector snapped off its bracket, a lead pinched between pipe and body, or a sensor body that's been hit. Physical damage found here usually explains the code without further testing.
- Confirm the feed, then ohm the element
Back-probe the harness half of the connector with the engine running and look for battery voltage on the heater feed. Then unplug and read across the sensor's heater contacts: a good feed and an open element is the usual combination and calls for a new sensor; a good element and no feed means a wiring break or the fuse.
- Remove the old sensor without wrecking the bung
Rust, not heat, is the problem this far back. Apply penetrating oil over several hours, warm the pipe briefly, and use a six-point or slotted O2 socket with even pressure. If the bung threads are rough, chase them before installing the new Bank 2 Sensor 3 so it seals.
DIY or shop? The tests are simple and the sensor's position at the back keeps it clear of engine-bay clutter, so a home mechanic with ramps can usually handle P0062. Expect corrosion: a sensor this far back on an older vehicle may be seized to the pipe, and a damaged bung means welding. A shop is the better choice when the sensor won't come out cleanly, when the wiring break hides in the body loom, or when the code returns after a new sensor.
Tools for the DIY steps: Scan tool with sensor-location data · Multimeter · Ramps or jack stands · O2 sensor socket · Penetrating oil · Thread chaser for the sensor bung
Not sure which step applies to your car? Get the likely cause for your exact vehicle before buying anything for P0062.
Start a case with P0062 and your car. Redline weighs these causes against what your car shows, and names the check that would settle it before you buy parts.
Can I drive with P0062?
Redline can’t determine from a symptom or code alone whether your car is safe to drive.
P0062: common questions
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.
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0062 from your phone. See our guide to the best OBD2 Bluetooth adapters. Run a repair shop? See Redline for shops.
Generic OBD-II reference. Manufacturer-specific behavior varies. Confirm with a scan tool and, for safety-related codes, a professional inspection. Cost ranges are reference ranges, not quotes.
Seeing P0062 on your car?
Every problem becomes a Case. Tell Redline what the car is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.