All codes › P0137
P0137: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
What it means
Voltage from the downstream O2 sensor on bank 1 (after the catalytic converter), which monitors converter efficiency is stuck low.
Severity: Low Can lead to a false P0420.
Common causes
- Failed sensor
- Exhaust leak near sensor
- Shorted wiring
- Lean running
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Often DIY. Check for exhaust leaks at the cat flange.
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 P0137 are verified.
Verified reader invoices for P0137: 0. Share your repair bill to help build real costs.
Tools that can read P0137
- 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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