Engine-Codes - Subaru - P0133 SUBARU

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

- Code Popularity: 16,524 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the P0133 SUBARU Code?

  • 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

|How to Fix the P0133 SUBARU Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0133 SUBARU code tech notes





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|What is the cost to diagnose the P0133 SUBARU code?

Labor: 1.0

The cost to diagnose the P0133 SUBARU code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0133 SUBARU code detected?

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

|What are P0133 SUBARU code possible symptoms?

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

|What Does the P0133 SUBARU Code Mean?

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.

Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1

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