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EmissionsModerate✅ DIY Friendly

P0152

O2 Sensor Circuit High Voltage Bank 2 Sensor 1

Upstream O2 sensor on Bank 2 reading rich constantly.

SeverityModerate
CategoryEmissions
Est. Repair Cost$150–$400
Code TypePowertrain
DIY RepairYes

⚡ Common Causes

  • ›Rich condition Bank 2
  • ›Leaking injectors Bank 2
  • ›Faulty sensor
  • ›Coolant or oil burning

⚠️ Symptoms

  • ›Rich running Bank 2
  • ›Black smoke
  • ›Poor fuel economy

✅ How to Fix — Step by Step

  • Step 1:Check Bank 2 injectors
  • Step 2:Test O2 sensor switching
  • Step 3:Check for coolant or oil in combustion
  • Step 4:Replace sensor

🔧 Diagnostic Tools Required

Using the correct diagnostic tools helps identify the root cause of P0152 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: Compare fuel trims for Bank 1 vs Bank 2 — a big difference points to a bank-specific issue.

Repair Cost Estimate

Full Repair Estimate
$150–$400
DIY Possible?
YES
Severity
Moderate

Frequently Asked Questions

What does OBD2 code P0152 mean?+
P0152 stands for O2 Sensor Circuit High Voltage Bank 2 Sensor 1. Upstream O2 sensor on Bank 2 reading rich constantly.
What causes code P0152?+
Rich condition Bank 2; Leaking injectors Bank 2; Faulty sensor; Coolant or oil burning
How do I fix code P0152?+
Check Bank 2 injectors; Test O2 sensor switching; Check for coolant or oil in combustion; Replace sensor
How much does it cost to fix P0152?+
Estimated repair cost for P0152 is $150–$400.
Is P0152 DIY-friendly?+
Yes — P0152 is generally DIY-friendly with basic tools.

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