AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Subaru - P0133 Subaru

P0133 Subaru Code - Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1

- Code Popularity: 20,304 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P0133 Subaru?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Front Heated Oxygen Sensor Bank 1
  • Front Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks
⚠ Does your Subaru have Safety Recalls? → Check here

How to Fix the DTC P0133 Subaru?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





User Submitted Video

Search for P0133 Subaru Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0133 Subaru code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The response of the voltage signal from the sensor takes more than the specified time.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

Code P0133 Subaru Description

This sensor is a Zirconia type sensor, used to monitor exhaust gases for the presence of oxygen. Depending on the level of oxygen in the exhaust stream, the oxygen sensor can inform the Engine Control Module of a rich or lean fuel mixture condition. The Engine Control Module (ECM) will then add or subtract the fuel trim to obtain an ideal mixture. The Diagnostic Trouble Code (DTC) will set when the oxygen sensor voltage signal response time slower than the specified time.

OBDII Code P0133 Subaru - Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1 - AutoCodes.com
P0133 Subaru Code - Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1

Need More Information on the Code?

Need more information on how to fix the P0133 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0133 Subaru code diagnosed by a professional: Find a repair shop in your area

Code P0133 Subaru comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0133 Subaru code? Have you replaced any parts?
Any information is appreciated. Thanks