HO2S Heater Control Circuit Bank 2 Sensor 3
What it means
P0062 means the ECM has found a fault in the heater control circuit of the bank 2, sensor 3 oxygen sensor — a third, downstream sensor used on some larger exhaust systems. The heater brings the sensor to operating temperature so it can monitor catalyst efficiency. The fault usually traces to the heater element, its wiring, or the connector. The engine runs normally, but emissions monitoring is affected.
Can I keep driving? Safe to drive — the engine runs normally. This is a downstream oxygen-sensor heater circuit fault, so expect a warning light and a possible failed emissions test until repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Failed or incomplete emissions readiness / smog test
- Slightly reduced fuel economy
- Delayed catalyst / closed-loop monitoring
Common causes
Most likely first
- Failed oxygen-sensor heater element (bank 2 sensor 3, downstream)Likely
- Damaged or shorted wiring in the heater control circuitCommon
- Corroded or loose sensor connectorCommon
- Failed engine control module heater driver (rare)Less often
How to diagnose & fix
Work through it in order
- Scan and confirm the code, then locate the bank 2 sensor 3 oxygen sensor (a third, downstream sensor on some exhausts).
- Inspect the connector and wiring for damage, shorts, or corrosion.
- Measure the sensor's heater resistance and compare against specification.
- Repair or replace damaged wiring and connectors.
- Replace the oxygen sensor if the heater element has failed; check the ECM driver last.
FAQ
Quick answers
Is it safe to drive with P0062?+
Can I just clear P0062?+
Related codes
Often seen with P0062
Read & clear P0062 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.