DTC P0051
O2 Sensor Heater Control Circuit Low (Bank 2 Sensor 1)
Diagnostic summary
P0051
What it means
O2 Sensor Heater Control Circuit Low (Bank 2 Sensor 1)
Can you drive?
⚠️ Drive with caution
Urgency
Medium 5/10
Typical price
$50 – $500
Check first
Faulty oxygen sensor
Based on real scans · 1 Updated Jun 4, 2026 Seen on Powertrain
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ℹ️ What does it mean?
O2 Sensor Heater Control Circuit Low (Bank 2 Sensor 1)
⚠️ Possible Causes
- ⚠ Faulty oxygen sensor
- ⚠ Short circuit in the wiring harness
- ⚠ Bad connection or corrosion in the connector
🚗 Can I drive with this code?
Drive with caution
🛠️ How to Fix
- 1 Replace the oxygen sensor
- 2 Repair or replace damaged wiring or connectors
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$18 – $325
Mechanic / labor$23 – $375
Repair range$50 – $500
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