Question 1

What does P0154 mean?

Accepted Answer

P0154 - O2 Sensor No Activity (Bank 2 Sensor 1). Upstream O2 sensor on bank 2 shows no switching activity.

Question 2

What are the symptoms of P0154?

Accepted Answer

Check engine light, Poor fuel economy, Open-loop fueling on bank 2

Question 3

What causes P0154?

Accepted Answer

Dead O2 sensor, Open circuit in wiring, Corroded connector

Question 4

How much does it cost to fix P0154?

Accepted Answer

Typical repair cost: $80-$300. Replace the sensor. A completely inactive sensor is almost always internally failed.

P0154 — O2 Sensor No Activity (Bank 2 Sensor 1)

Don't guess — diagnose P0154 the right way