P0140 Fault Code — O2 Sensor No Activity (Bank 1 Sensor 2)

Severity: 🟡 Medium — diagnose within a week

Post-cat O2 not switching — open circuit or heater failure.

Common Symptoms

Common Causes

How We Fix It

Replace downstream O2 sensor, check circuit.

Frequently Asked Questions

What does P0140 mean?

P0140 (O2 Sensor No Activity (Bank 1 Sensor 2)) means Post-cat O2 not switching — open circuit or heater failure. Common symptoms include mil on, catalyst efficiency not being monitored.

How much does P0140 repair cost in Hyderabad?

At GarageNation Hyderabad, we diagnose P0140 with dealer-grade scan tools and provide a fixed quote before any work begins. Call +91 8106316369 for an estimate.

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