All codes › P0030
P0030: HO2S Heater Control Circuit (Bank 1 Sensor 1)
What it means
The heater circuit for the bank 1 upstream O2 sensor has an electrical fault, so the sensor warms up too slowly.
Severity: Low No drivability effect; the sensor just warms more slowly, which hurts cold-start emissions.
Common causes
- Burned-out O2 sensor heater
- Blown O2 heater fuse
- Damaged connector
- Wiring melted on exhaust
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Often DIY. Check the O2 heater fuse, then replace the bank 1 upstream sensor with an O2 socket.
Repair cost
SEEDED ESTIMATE Roughly $70–$330
Most likely repair: oxygen sensor. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Oxygen sensor | $36 | $168 | Typical listed retail range, source |
| Labor 0.3–1 hr | $30 | $160 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0030 are verified.
Verified reader invoices for P0030: 0. Share your repair bill to help build real costs.
Tools that can read P0030
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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