P1133 - HO2S Insufficient Switching Sensor 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1133 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

    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 code

    Labor: 1.0

    The cost of diagnosing the P1133 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1133 Possible Symptoms

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

P1133 Meaning

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 - HO2S Insufficient Switching Sensor 1 - Engine-Codes.com

P1133 More Information

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