AutoCodes - OBDII Code List - P1133 CHEVROLET

P1133 CHEVROLET - HO2S Insufficient Switching Bank 1 Sensor 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3    What is this?
Table of contents

P1133 CHEVROLET Possible Causes

  • Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
  • Vacuum leak
  • Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 harness is open or shorted
  • Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 circuit poor electrical connection

How do I fix code P1133 CHEVROLET?

Check 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.

Cost of diagnosing the P1133 CHEVROLET code

Labor: 1.0

The cost of diagnosing the P1133 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

If the Powertrain Control Module (PCM) determines that the front HO2S did not switch enough times, the PCM will set the P1133 code.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1133 CHEVROLET Description

The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) activity for 90 seconds after closed loop operation has begun. The PCM determines if the front HO2S is functioning properly by counting the number of HO2S-1 Lean/Rich (L/R) and Rich/Lean (R/L) switches.
OBDII Code P1133 Chevrolet - HO2S Insufficient Switching Bank 1 Sensor 1 - AutoCodes.com

More Information

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