Engine-Codes - Acura - P0133 Acura

P0133 Acura Code - Air/Fuel Ratio Sensor 1 Malfunction/Slow Response

- Code Popularity: 17,980 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents
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What are the Possible Causes of the DTC P0133 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 Air/Fuel Ratio (A/F) Sensor (Sensor 1)
  • A/F Sensor (Sensor 1) harness is open or shorted
  • A/F Sensor (Sensor 1) circuit poor electrical connection

Code Tech Notes

Replacing the Front Heated Oxygen Sensor Bank 1 usually takes care of the problem

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How to Fix the DTC P0133 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 P0133 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.

What are Code Possible Symptoms?

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

What Does the P0133 Acura Code Mean?

The Air/Fuel Ratio (A/F) Sensor (Sensor 1) is responsible for measuring the oxygen concentration in the exhaust gas and providing this information to the Powertrain Control Module (PCM). The PCM uses this information to adjust the air/fuel ratio in the engine, ensuring that it is at the optimal level for emissions and fuel economy.
The A/F Sensor (Sensor 1) has a linear signal output in relation to the oxygen concentration. This means that the higher the oxygen concentration in the exhaust gas, the higher the voltage output from the sensor. The PCM converts this voltage output to an air/fuel ratio value, which it then uses to adjust the fuel mixture in the engine.
The PCM also compares the response characteristics of the A/F Sensor (Sensor 1) to a set of predetermined values. If the sensor's response is outside of these predetermined values, the PCM will store a Diagnostic Trouble Code (DTC).

P0133 Acura Code - Air/Fuel Ratio Sensor 1 Malfunction/Slow Response

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