Severity: 🟡 Medium — diagnose within a week
Downstream O2 reading high — rich exhaust or failed sensor.
Check fuelling first, replace downstream O2 sensor.
What does P0138 mean?
P0138 (O2 Sensor High Voltage (Bank 1 Sensor 2)) means Downstream O2 reading high — rich exhaust or failed sensor. Common symptoms include mil on, rich smell from exhaust, fuel economy drop.
How much does P0138 repair cost in Hyderabad?
At GarageNation Hyderabad, we diagnose P0138 with dealer-grade scan tools and provide a fixed quote before any work begins. Call +91 8106316369 for an estimate.
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