StopOrDrive

Enter a 5-character code such as P0420, P0301, or P0457.

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Codes starting with P are engine and transmission, B are body, C are chassis, and U are network communication. A 0 as the second character means a generic code shared by all makes; a 1 means a manufacturer-specific code, so its meaning depends on your brand.

A steady check engine light usually means get it checked soon. A flashing check engine light means an active misfire: reduce speed and stop driving as soon as it is safe.

That doesn't look like an OBD-II code

A valid code is one letter (P, B, C, or U) followed by four characters, for example P0420.

P0133 Oxygen sensor slow response (Bank 1 Sensor 1)

Can I drive with P0133?

Drive

Safe to keep driving normally. Fix it when convenient.

The car runs normally, but fuel economy and emissions get worse.

What does P0133 mean?

The upstream oxygen sensor on bank 1 is reacting too slowly to changes in the exhaust.

What causes P0133?

  1. Aging oxygen sensor
  2. Exhaust leak before the sensor
  3. Sensor contaminated by burning oil or coolant
  4. Wiring problem

How much does it cost to fix P0133?

$150 – $450

Oxygen sensor replacement: $150–$450.

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