Question 1

What does P0133 mean?

Accepted Answer

P0133 - O2 Sensor Slow Response (Bank 1 Sensor 1). Upstream O2 sensor switching between rich and lean too slowly.

Question 2

What are the symptoms of P0133?

Accepted Answer

Check engine light, Slightly reduced fuel economy

Question 3

What causes P0133?

Accepted Answer

Aging O2 sensor, Exhaust leak near sensor, Contaminated sensor, Lazy sensor element

Question 4

How much does it cost to fix P0133?

Accepted Answer

Typical repair cost: $80-$300. Over 100K miles with original sensors? Replacement is the right call. $80-150 for a quality upstream O2 sensor.

P0133 — O2 Sensor Slow Response (Bank 1 Sensor 1)

Don't guess — diagnose P0133 the right way