AutoCodes – Honda – P2000 Honda

P2000 Honda Code - NOx Adsorptive Catalyst Efficiency Below Threshold

Quick Answer

The NOx Adsorptive Three-Way Catalytic Converter (TWC) absorbs NOx created during lean-burn running when the oxygen concentration is high. Common causes include Faulty NOX Three-Way Catalytic Converter (TWC), Faulty Secondary HO2S (Sensor 2), Faulty Third HO2S (Sensor 3). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2000 Honda indicates NOx Adsorptive Catalyst Efficiency Below Threshold.
Common causes
Common causes include Faulty NOX Three-Way Catalytic Converter (TWC), Faulty Secondary HO2S (Sensor 2), Faulty Third HO2S (Sensor 3).
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 5,056
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 03, 2020
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Code P2000 Honda Description

The NOx Adsorptive Three-Way Catalytic Converter (TWC) absorbs NOx created during lean-burn running when the oxygen concentration is high. Then the engine is put into a richer running mode where the oxygen concentration and NOx levels are low, and the absorbed NOx is released, keeping the average NOx emissions low. The Diagnostic Trouble Code (DTC) will set when the NOx Adsorptive Catalyst Efficiency is below the threshold.
OBDII Code P2000 Honda - NOx Adsorptive Catalyst Efficiency Below Threshold - AutoCodes.com
P2000 Honda Code - NOx Adsorptive Catalyst Efficiency Below Threshold

What are the Possible Causes of the DTC P2000 Honda?

  • Faulty NOX Three-Way Catalytic Converter (TWC)
  • Faulty Secondary HO2S (Sensor 2)
  • Faulty Third HO2S (Sensor 3)
  • Software update

How to Fix the DTC P2000 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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2000 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.

Need more information about the P2000 Honda code?

Need more information on how to fix the P2000 Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2000 Honda code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2000 Honda Code

1. What are the common symptoms of OBDII code P2000 in a Honda vehicle?

- Common symptoms include reduced engine performance, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P2000 in a Honda related to the NOx adsorptive catalyst?

- Possible causes can include a faulty NOx adsorptive catalyst, damaged oxygen sensors, exhaust leaks, or issues with the engine's air-fuel mixture.

3. How can I diagnose OBDII code P2000 in my Honda?

- Diagnosis typically involves using an OBDII scanner to read the code, inspecting the NOx adsorptive catalyst, checking the oxygen sensors, and conducting a thorough examination of the exhaust system.

4. Can I continue driving my Honda with OBDII code P2000 present?

- It is generally not recommended to continue driving with this code active, as it can lead to further damage to the catalytic converter and potentially affect the vehicle's emissions output.

5. What is the repair process for OBDII code P2000 in a Honda?

- The repair process may involve replacing the NOx adsorptive catalyst, repairing any exhaust leaks, replacing faulty oxygen sensors, and resetting the Check Engine Light.

6. Are there any DIY tips for addressing OBDII code P2000 in a Honda?

- While some basic inspections can be done by DIY enthusiasts, it is recommended to consult a qualified mechanic for proper diagnosis and repair of this code.

7. How much does it typically cost to repair OBDII code P2000 in a Honda?

- The cost of repairs can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a regular maintenance routine help prevent OBDII code P2000 in a Honda?

- Keeping up with regular maintenance, such as timely oil changes and ensuring the engine runs efficiently, can help prevent issues that may trigger this code.

9. Is it safe to clear the OBDII code P2000 in a Honda without addressing the underlying issue?

- Clearing the code without fixing the root cause may temporarily turn off the Check Engine Light, but the issue will likely resurface, potentially causing more damage over time.

10. How long does it take to repair OBDII code P2000 in a Honda?

- The repair time can vary based on the specific problem, availability of parts, and the mechanic's workload, but it may range from a few hours to a full day.

1. What are the common symptoms of OBDII code P2000 in a Honda related to NOx Adsorptive Catalyst Efficiency Below Threshold?

- Common symptoms include the illumination of the Check Engine Light (CEL), reduced engine performance, and potential increase in emissions.

2. What are the possible causes of OBDII code P2000 in a Honda?

- The code P2000 can be triggered by issues such as a faulty NOx sensor, a malfunctioning catalytic converter, exhaust leaks, or issues with the engine's air-fuel ratio.

3. How can I diagnose the cause of OBDII code P2000 in my Honda?

- Diagnosis typically involves using an OBDII scanner to retrieve the code and then conducting further tests to pinpoint the exact cause, such as inspecting the NOx sensor, checking for exhaust leaks, and testing the catalytic converter.

4. Can I still drive my Honda with OBDII code P2000 present?

- It is not recommended to drive your vehicle with the P2000 code active, as it can lead to increased emissions and potential damage to the catalytic converter.

5. What are some repair tips for fixing OBDII code P2000 in a Honda?

- Repair tips may include replacing the faulty NOx sensor, repairing any exhaust leaks, ensuring proper air-fuel ratio, and possibly replacing the catalytic converter if it is damaged.

6. How much does it typically cost to repair OBDII code P2000 in a Honda?

- The cost of repair can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, especially if parts like the catalytic converter need replacement.

7. Can I reset the OBDII code P2000 in my Honda using a scanner?

- Yes, you can reset the code using an OBDII scanner, but it is important to diagnose and address the underlying issue causing the code before resetting it.

8. Will OBDII code P2000 cause my Honda to fail an emissions test?

- Yes, having the P2000 code present can cause your vehicle to fail an emissions test due to the inefficient operation of the NOx adsorptive catalyst.

9. How long does it typically take to repair OBDII code P2000 in a Honda?

- The repair time can vary depending on the exact cause and complexity of the issue, but it may take a few hours to a full day to diagnose and repair the problem.

10. Are there any preventive measures to avoid OBDII code P2000 in a Honda?

- Regular maintenance, such as timely replacing oxygen sensors, maintaining proper engine tune-up, and using high-quality fuel, can help prevent issues leading to the P2000 code in a Honda.

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