P0162 — O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
Drive with caution — fix soon.
What P0162 means
This code indicates a malfunction in the heater circuit of the bank 2 sensor 2 oxygen sensor, meaning the voltage or resistance in that circuit is out of range. The heater allows the sensor to reach the right temperature quickly so it can monitor exhaust accurately. Repairs usually involve replacing the oxygen sensor, but a blown fuse, bad connector, or wiring damage can also trigger it.
Common symptoms
- Check engine light is on
- Slightly higher fuel consumption
- Failed emissions or smog inspection
- Engine generally runs and drives normally
- Possible related oxygen sensor or heater codes stored
Common causes
- Failed oxygen sensor heater element
- Blown or weak heater circuit fuse
- Corroded, melted, or loose sensor connector
- Damaged wiring or open circuit to the sensor
- Faulty ground or power feed to the heater
Typical repair cost
$150 – $400
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0162 code?
Usually yes, because this code affects emissions monitoring more than how the car drives. It's safe for short trips, though you may notice slightly worse fuel economy. Try to get it repaired within a couple of weeks to avoid further complications.
How much does it cost to fix a P0162 code?
Expect roughly $150 to $400 in most cases. The oxygen sensor and about an hour of labor make up most of the bill. If a fuse or connector is the actual culprit, the repair can cost much less.
Is a P0162 code serious?
Not particularly. The vehicle stays drivable and there's no safety hazard, but it does prevent you from passing an emissions test and can slightly raise fuel use. It's best to fix it promptly rather than let it linger.
Could a blown fuse cause a P0162 code?
Yes, a blown fuse feeding the oxygen sensor heater circuit is a common and inexpensive cause. A technician will typically check fuses, the connector, and wiring before condemning the sensor itself, which can save you the cost of an unnecessary part.