P0133 Oxygen Sensor Circuit Slow Response

Description and meaning of DTC p0133

This is considered a generic powertrain DTC (code). That means it's definition is the same for all makes and models of OBD-II vehicles, however specific repair steps may vary depending on the vehicle. This trouble code involves the front oxygen sensor on Bank1. This code indicates the engine air fuel ratio is not being adjusted bythe oxygen sensor signal or the ECM as expected to do so, or not adjusted asoften as expected to do so once the engine is warmed or under normal engineuse.

p0133 diagnostic trouble code symptoms

You will likely not notice any drivability problems, although there may besymptoms.

DTC p0133 - possible causes

A code P0133 may mean that one or more of the following has happened:The oxygen sensor is faultyThe wiring to the sensor is broken / frayedThere is an exhaust leak

How to fix OBD-II diagnostic trouble code p0133

The simplest thing to do is to reset the code and see if it comes back. If the code comes back, the problem is more than likely the front Bank1 oxygen sensor. You will likely wind up replacing it but you should alsoconsider these possible solutions:Check and fix any exhaust leaksCheck for wiring problems (shorted, frayed wires)Check the frequency and amplitude of the oxygen sensor (advanced)Check for a deteriorating / contaminated oxygen sensor, replace if necessaryCheck for inlet air leaksCheck the MAF sensor for proper operation

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