Engine-Codes - Acura - P1133 Acura

P1133 Acura Code - HO2S Insufficient Switching Sensor 1

- Code Popularity: 3,192 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1133 Acura?

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 Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
  • Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 harness is open or shorted
  • Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 circuit poor electrical conection
  • Air leak in exhaust near O2 sensor
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How to Fix the DTC P1133 Acura?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1133 Acura code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair 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.

What are Code Possible Symptoms?

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

What Does the P1133 Acura Code Mean?

The Engine Control Module (ECM) monitors the Heated Oxygen Sensor (HO2S) activity for 90 seconds after closed loop operation has begun. The ECM 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.

P1133 Acura Code - HO2S Insufficient Switching Sensor 1

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