Failed heater element inside the Bank 2 Sensor 3 oxygen sensor (open or shorted); Damaged, chafed or heat-affected wiring to the sensor heater circuit; Corroded, loose or contaminated connector at the sensor or in the harness; Blown fuse or faulty relay supplying the heater circuit (where fitted); Exhaust leak or water ingress damaging the sensor and its connector; Faulty heater driver in the engine control unit.

P0062

HO2S Heater Control Circuit Bank 2 Sensor 3.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
62: FaultThe specific fault in that area

What it means

P0062 is the generic code for a fault in the heater control circuit of the heated oxygen sensor on Bank 2, Sensor 3. The control unit drives the sensor heater so the sensor reaches working temperature quickly, and it monitors that circuit. The code sets when the circuit reads open, shorted or outside the expected range. Sensor 3 is normally a further downstream sensor, and its position depends on the engine layout.

Symptoms

Engine management light on
No other obvious driveability change in many cases
Slightly slower closed-loop catalyst monitoring
Related oxygen sensor or catalyst monitor codes stored
Emissions readiness monitors not completing
Possible failed MOT emissions or readiness check

Possible causes

Failed heater element inside the Bank 2 Sensor 3 oxygen sensor (open or shorted)likely
Damaged, chafed or heat-affected wiring to the sensor heater circuitlikely
Corroded, loose or contaminated connector at the sensor or in the harnesslikely
Blown fuse or faulty relay supplying the heater circuit (where fitted)possible
Exhaust leak or water ingress damaging the sensor and its connectorpossible
Faulty heater driver in the engine control unitrare

How to diagnose

Read all stored codes and freeze frame data, noting whether other oxygen sensor codes are present, then check for any manufacturer bulletins for the model.
Confirm from the wiring information for the specific engine which sensor is Bank 2 Sensor 3 and how its heater is powered and controlled.
Visually inspect the sensor wiring and connector for chafing, melting, corrosion, water and exhaust heat damage.
Check the fuse and relay for the heater circuit, if the vehicle uses them.
With the connector unplugged, measure the heater element resistance and compare it with the specification for that sensor.
Check for battery supply and a control signal or ground at the harness connector with the ignition on and the engine running, as the circuit design requires.
Test the harness for continuity and for shorts to earth or supply between the sensor and the control unit.
Use live data or a scope to confirm the heater is being commanded and drawing current after repairs.

How to fix

Replace the Bank 2 Sensor 3 oxygen sensor if the heater element is open or out of specification.
Repair or replace damaged wiring, and secure it away from hot exhaust parts.
Clean or replace corroded or damaged connectors and terminals.
Replace the faulty fuse or relay after finding why it failed.
Repair any exhaust leak near the sensor.
Diagnose and, only if proven faulty, repair or replace the control unit.

Can I keep driving?

Low severity

The car can normally be driven while you book it in, as this fault rarely affects safety or causes engine damage. Get it fixed reasonably soon, because it can stop the emissions monitors running and cause an MOT failure.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.