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Engine-Codes – Honda – P0135 1998 Honda Civic

P0135 1998 Honda Civic Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

Quick Answer

The P0135 diagnostic trouble code (DTC) for a 1998 Honda Civic indicates an issue with the O2 sensor heater circuit in Bank 1 Sensor 1. Common causes include Faulty O2 Sensor: The O2 sensor itself may be defective, causing the heater circuit malfunction, Wiring Issues: Damaged or corroded wiring connected to the O2 sensor can disrupt the heater circuit's operation, Blown Fuse: A blown fuse in the O2 sensor heater circuit can prevent the sensor from receiving power. 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
P0135 1998 Honda Civic indicates O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
Common causes
Common causes include Faulty O2 Sensor: The O2 sensor itself may be defective, causing the heater circuit malfunction, Wiring Issues: Damaged or corroded wiring connected to the O2 sensor can disrupt the heater circuit's operation, Blown Fuse: A blown fuse in the O2 sensor heater circuit can prevent the sensor from receiving power.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0135 1998 Honda Civic Description

The P0135 diagnostic trouble code (DTC) for a 1998 Honda Civic indicates an issue with the O2 sensor heater circuit in Bank 1 Sensor 1. The O2 sensor, also known as the oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases. This specific sensor is located in the exhaust manifold before the catalytic converter.

OBDII Code P0135 1998 Honda Civic - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
P0135 1998 Honda Civic Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

Common Causes of P0135 1998 Honda Civic

  1. Faulty O2 Sensor: The O2 sensor itself may be defective, causing the heater circuit malfunction.
  2. Wiring Issues: Damaged or corroded wiring connected to the O2 sensor can disrupt the heater circuit's operation.
  3. Blown Fuse: A blown fuse in the O2 sensor heater circuit can prevent the sensor from receiving power.
  4. ECM Malfunction: A problem with the engine control module (ECM) can also trigger the P0135 code.

Symptoms of P0135 1998 Honda Civic

  1. Check Engine Light: The most common symptom associated with the P0135 code is the illumination of the check engine light on the dashboard.
  2. Poor Fuel Economy: A malfunctioning O2 sensor heater circuit can lead to inefficient fuel combustion, resulting in decreased fuel efficiency.
  3. Rough Idle: The engine may experience rough idling or hesitation when the O2 sensor is not functioning properly.
  4. Increased Emissions: A faulty O2 sensor can cause the vehicle to produce higher emissions, potentially leading to environmental concerns.

How to Fix P0135 1998 Honda Civic

  1. Diagnose the Issue: Use an OBD-II scanner to retrieve the specific trouble code and determine if the problem lies with the O2 sensor heater circuit.
  2. Inspect Wiring: Check the wiring harness connected to the O2 sensor for any signs of damage or corrosion. Repair or replace as needed.
  3. Test O2 Sensor: Test the O2 sensor to ensure it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Check Fuse: Inspect the fuse related to the O2 sensor heater circuit and replace it if necessary.
  5. Clear Codes: After completing the repairs, clear the diagnostic trouble codes and reset the check engine light.

Cost to Fix P0135 1998 Honda Civic

The typical repair costs for addressing a P0135 code in a 1998 Honda Civic can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the price of a new O2 sensor, wiring repairs, and diagnostic labor. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Additionally, prices for parts may differ based on the brand and quality of the components used. For a more accurate cost estimate, it is recommended to consult with local auto repair shops.

What does this mean?

Tech Notes for P0135 1998 Honda Civic

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem

When is the Code Detected?

Current amperage in the front heated oxygen sensor heater circuit is out of the normal range. (An improper voltage drop signal is sent to ECM through the front heated oxygen sensor heat

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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 P0135 1998 Honda Civic Code

1. What does OBDII code P0135 on a 1998 Honda Civic mean?

- This code indicates a malfunction in the O2 sensor heater circuit for Bank 1 Sensor 1, which is the upstream oxygen sensor located before the catalytic converter.

2. What are common symptoms of O2 sensor heater circuit malfunction (P0135) in a 1998 Honda Civic?

- Common symptoms include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light.

3. What are possible causes of OBDII code P0135 in a 1998 Honda Civic?

- The most common causes include a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or a problem with the vehicle's engine control module (ECM).

4. How can I diagnose the O2 sensor heater circuit malfunction in my 1998 Honda Civic?

- You can use a multimeter to test the O2 sensor heater circuit for continuity, check for any damaged wiring or connectors, and inspect the fuse related to the O2 sensor heater.

5. Can I continue driving my 1998 Honda Civic with OBDII code P0135?

- It is generally safe to drive the vehicle for a short period with this code, but it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

6. How can I repair OBDII code P0135 on my 1998 Honda Civic?

- To repair the issue, you may need to replace the O2 sensor, repair any damaged wiring or connectors, replace a blown fuse, or reprogram the engine control module if necessary.

7. Are there any DIY tips for fixing O2 sensor heater circuit malfunction in a 1998 Honda Civic?

- While some repairs may require professional assistance, checking and replacing the O2 sensor, inspecting wiring, and testing the fuse can often be done by DIY enthusiasts with the right tools and knowledge.

8. What is the purpose of the O2 sensor heater circuit in a 1998 Honda Civic?

- The O2 sensor heater circuit helps the O2 sensor reach its operating temperature faster, allowing it to provide accurate readings to the engine control module for optimal fuel efficiency and emissions control.

9. Can a faulty O2 sensor heater circuit cause other issues in a 1998 Honda Civic?

- Yes, a malfunctioning O2 sensor heater circuit can lead to poor engine performance, increased emissions, and potential damage to the catalytic converter if left unresolved.

10. How much does it cost to repair OBDII code P0135 on a 1998 Honda Civic?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

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