All codes › P0136
P0136: O2 Sensor Circuit (Bank 1 Sensor 2)
What it means
There's a general circuit fault with the downstream O2 sensor on bank 1 (after the catalytic converter), which monitors converter efficiency.
Severity: Low Affects catalyst monitoring only.
Common causes
- Failed downstream O2 sensor
- Damaged wiring under car
- Exhaust leak
- Corroded connector
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Often DIY. Downstream sensor connectors corrode from road spray; inspect first.
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 P0136 are verified.
Verified reader invoices for P0136: 0. Share your repair bill to help build real costs.
Tools that can read P0136
- 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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