P0135 Acura Code - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction
Quick Answer
The P0135 diagnostic trouble code for Acura vehicles indicates a malfunction in the air/fuel ratio sensor 1 heater circuit. Common causes include Faulty Air/Fuel Ratio Sensor: The sensor itself may be defective or damaged, causing the heater circuit malfunction, Damaged Heater Circuit: The heater circuit within the sensor may be damaged, preventing it from reaching the required operating temperature, Wiring/Connector Issues: Corroded, damaged, or loose wiring or connectors can disrupt the connection between the sensor and the ECU. 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 Acura indicates Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction.
- Common causes
- Common causes include Faulty Air/Fuel Ratio Sensor: The sensor itself may be defective or damaged, causing the heater circuit malfunction, Damaged Heater Circuit: The heater circuit within the sensor may be damaged, preventing it from reaching the required operating temperature, Wiring/Connector Issues: Corroded, damaged, or loose wiring or connectors can disrupt the connection between the sensor and the ECU.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0135 Acura Description
The P0135 diagnostic trouble code for Acura vehicles indicates a malfunction in the air/fuel ratio sensor 1 heater circuit. This sensor is responsible for monitoring the oxygen content in the exhaust gases and providing feedback to the engine control unit (ECU) to adjust the air/fuel mixture for optimal combustion. The heater circuit in the sensor is designed to quickly bring the sensor up to operating temperature for accurate readings.
Common Causes of P0135 Acura
- Faulty Air/Fuel Ratio Sensor: The sensor itself may be defective or damaged, causing the heater circuit malfunction.
- Damaged Heater Circuit: The heater circuit within the sensor may be damaged, preventing it from reaching the required operating temperature.
- Wiring/Connector Issues: Corroded, damaged, or loose wiring or connectors can disrupt the connection between the sensor and the ECU.
- ECU Malfunction: A malfunctioning ECU can also trigger the P0135 code by failing to communicate properly with the air/fuel ratio sensor.
Symptoms of P0135 Acura
- Check Engine Light: The most common symptom associated with the P0135 code is the illumination of the check engine light on the vehicle's dashboard.
- Poor Fuel Economy: A malfunctioning air/fuel ratio sensor heater circuit can cause the engine to run rich or lean, leading to decreased fuel efficiency.
- Rough Idle: The engine may experience rough idling or hesitation when the air/fuel mixture is not adjusted correctly.
- Reduced Power: The vehicle may exhibit reduced power output or acceleration due to improper air/fuel ratio adjustments.
- Increased Emissions: A faulty air/fuel ratio sensor can result in higher emissions output, potentially causing the vehicle to fail emissions tests.
How to Fix P0135 Acura
- Diagnose the Issue: Use a diagnostic tool to retrieve the specific trouble code and pinpoint the exact cause of the malfunction.
- Inspect the Sensor: Check the air/fuel ratio sensor for any visible damage or signs of wear. Replace the sensor if necessary.
- Test the Heater Circuit: Test the sensor's heater circuit to ensure it is functioning correctly and reaching the required temperature.
- Check Wiring/Connectors: Inspect the wiring and connectors for any damage or corrosion. Repair or replace as needed.
- Clear the Code: Once the issue is resolved, clear the trouble code using a diagnostic tool to reset the check engine light.
Cost to Fix P0135 Acura
The typical repair costs for addressing a P0135 code in an Acura vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for replacing an air/fuel ratio sensor can range from $100 to $300, while the labor costs can be between $80 and $150 per hour.
Tech Notes for P0135 Acura
Need more information about the P0135 Acura code?
Need more information on how to fix the P0135 Acura code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0135 Acura code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0135 Acura Code
What does the OBDII code P0135 mean for an Acura?
The P0135 code indicates a malfunction in the heater circuit of the Air/Fuel Ratio Sensor 1, which is located in front of the catalytic converter.
What are the common symptoms of code P0135 in an Acura?
Symptoms may include an illuminated check engine light, increased fuel consumption, poor engine performance, or difficulty passing emissions tests.
What causes the P0135 code to appear in an Acura?
Common causes include a faulty air/fuel ratio sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or a malfunctioning engine control module (ECM).
Can I drive my Acura with the P0135 code?
While the vehicle may still be drivable, ignoring this code can lead to poor fuel efficiency and potential damage to the catalytic converter over time.
How do I diagnose the P0135 code in an Acura?
Diagnosis typically involves checking the air/fuel ratio sensor, inspecting the wiring and connectors for damage, and testing the voltage and resistance of the heater circuit.
Will replacing the air/fuel ratio sensor fix the P0135 code?
Replacing the sensor can often resolve the issue, but it’s important to confirm that the problem isn’t caused by damaged wiring, a blown fuse, or another underlying issue.
How much does it cost to fix the P0135 code on an Acura?
Repair costs can range from $200 to $400 or more, depending on whether the air/fuel ratio sensor needs replacement or if additional wiring repairs are required.
Can a blown fuse cause the P0135 code to trigger?
Yes, a blown fuse in the heater circuit can prevent the air/fuel ratio sensor from functioning properly and trigger the P0135 code.
How can I prevent the P0135 code from reoccurring in my Acura?
Regular maintenance, including inspecting the wiring and connectors for damage and replacing the air/fuel ratio sensor at recommended intervals, can help prevent this issue.
Does clearing the P0135 code with a scanner solve the problem?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be fixed to prevent the code from returning.
Discuss the causes and fixes for P0135 Acura OBDII Code
Code P0135 Acura comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.