P0133 Honda Code - Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
Quick Answer
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). Common causes include 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. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0133 Honda indicates Air/Fuel Ratio Sensor 1 Malfunction/Slow Response.
- Common causes
- Common causes include 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.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0133 Honda Description
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).
What are the Possible Causes of the DTC P0133 Honda?
- 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
How to Fix the DTC P0133 Honda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
There are Factory Service Bulletins for the following Honda models:
1998-2001 Honda Prelude
1998-2001 Honda Prelude Factory Service Bulletin Honda Prelude OBDII Code P0133
1998-2002 Honda Accord
1998-2002 Honda Accord Factory Service Bulletin Honda Accord OBDII Code P0133
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0133 Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Honda Models
- P0133 2008 Honda Accord — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 2009 Honda Accord — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 2010 Honda Accord — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 1996 Honda Civic — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 1997 Honda Civic — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 1998 Honda Civic — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 1999 Honda Civic — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 2000 Honda Civic — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
- P0133 2016 Honda CR-V — Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
- P0133 2017 Honda CR-V — Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
- P0133 2018 Honda CR-V — Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
- P0133 2019 Honda CR-V — Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
- P0133 2020 Honda CR-V — Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
- P0133 2021 Honda CR-V — Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
Frequently Asked Questions about P0133 Honda Code
What does the OBDII code P0133 mean for a Honda vehicle?
P0133 indicates that the Air/Fuel Ratio Sensor 1 (upstream oxygen sensor) is responding too slowly to changes in the air/fuel mixture, which can affect engine performance and emissions.
What are the common symptoms of code P0133 in a Honda?
Common symptoms include poor fuel economy, rough idle, reduced engine performance, and the illumination of the Check Engine Light.
What causes the P0133 code to appear in a Honda?
Possible causes include a faulty air/fuel ratio sensor, an exhaust leak near the sensor, wiring or connector issues, or an engine running excessively rich or lean.
Can a dirty air filter cause the P0133 code in a Honda?
While unlikely, a severely clogged air filter can restrict airflow, potentially affecting the air/fuel mixture and triggering this code.
How do you fix the P0133 code on a Honda?
Repairs may involve replacing the air/fuel ratio sensor, fixing exhaust leaks, inspecting and repairing damaged wiring or connectors, or addressing engine performance issues.
Is it safe to drive a Honda with the P0133 code?
Driving with this code is generally safe in the short term, but prolonged driving can lead to poor fuel economy, increased emissions, and potential damage to the catalytic converter.
How much does it typically cost to fix the P0133 code on a Honda?
Repair costs can vary, but replacing the air/fuel ratio sensor typically ranges from $150 to $400, depending on labor rates and parts pricing.
Can a bad catalytic converter cause the P0133 code on a Honda?
A failing catalytic converter is not a direct cause of P0133, but if it affects the air/fuel ratio sensor's readings, it could potentially contribute to the issue.
How do you diagnose the P0133 code on a Honda?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the air/fuel ratio sensor and wiring, checking for exhaust leaks, and testing the sensor's response time with a multimeter or scan tool.
Can a software update fix the P0133 code on a Honda?
In rare cases, a software update from the manufacturer may address issues with how the ECU interprets sensor data, but this is less common than hardware repairs.
Discuss the causes and fixes for P0133 Honda OBDII Code
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