By Ezra Lane You're facing a P0135 code in your Nissan, which points to a problem with the O2 sensor heater circuit in Bank 1 Sensor 1. This issue typically stems from a faulty sensor, damaged wiring, or a blown fuse, affecting your car's fuel efficiency and increasing emissions during cold starts. Proper diagnosis involves checking the sensor's resistance with a multimeter and inspecting the wiring and fuses. Repair costs vary, generally ranging from $70 to $450, depending on whether you opt for aftermarket parts or OEM replacements. Addressing this early helps avoid more serious engine problems and keep your vehicle compliant with emissions standards. If you explore further, you'll discover additional insights and potential fixes for this fault.
P0135 Nissan Code Meaning
The P0135 code on a Nissan signifies an issue with the O2 sensor's heater circuit in bank 1 sensor 1, often due to a blown fuse, faulty wiring, or a defective sensor.
It affects the sensor's efficiency, especially during cold starts, triggering the vehicle's diagnostic system.
Error Code P0135 Symptoms
If your Nissan's O2 sensor heater circuit in Bank 1, Sensor 1 isn't working right, you might notice a few things before the check engine light turns on.
Here's what to look for:
- Check Engine Light: The check engine light will turn on if there's a problem with the heater circuit.
- Poor Fuel Economy: You might see a drop in your miles per gallon. This happens because the sensor can't properly adjust the fuel and air mix, so your car uses more fuel.
- Rough Engine Idle: When the car is sitting still, the engine might feel bumpy or uneven. This can happen if the O2 sensor isn't working well.
If you see these signs, it's a good idea to get your car checked.
Fixing the problem early can prevent bigger issues later on.
Causes of Nissan P0135 Fault Code
When you see the P0135 error code on your Nissan, a few things might be causing it.
Here's a breakdown of the common causes:
- Bad Oxygen Sensor: The oxygen sensor, especially the one in Bank 1 Sensor 1, may not be working right. This sensor checks the exhaust gases, and if it's faulty, it can't manage the air-fuel mix well.
- Wiring or Connector Issues: The wires or connectors going to the oxygen sensor might be damaged by heat, rust, or wear and tear. This can mess up the sensor's heating circuit and trigger the P0135 code.
- Blown Fuse: Sometimes, a blown fuse is the reason. Check the fuse related to the O2 sensor's heater circuit and replace it if it's not working.
These problems can make your engine not run as smoothly, leading to more emissions and fuel use.
Figuring out the exact cause can help get your Nissan back to running well and meeting emission standards.
Tools Needed to Diagnose
To find out what's wrong with the P0135 code in a Nissan, you'll need a few tools.
These tools help you check the oxygen sensor heater circuit in Bank 1 Sensor 1. Getting the right tools ready makes the job easier and quicker.
Here's what you need:
- OBD-II Scanner: This gadget lets you read fault codes from your car's computer. It confirms the P0135 code and may show other codes too.
- Multimeter: Use this to measure voltage and resistance in the oxygen sensor's heater circuit. It helps you find electrical issues like broken wires or bad connections.
- Wiring Diagram: This shows the wiring for your Nissan model. It helps you trace the heater circuit so you can test the right parts.
With these tools, you can figure out what's causing the problem.
How to Fix P0135 Nissan Error Code – Step by Step
Step 1: Verify the Oxygen Sensor's Functionality
Access the oxygen sensor, usually located on the exhaust manifold. Disconnect the sensor and use a multimeter to check the heater's resistance. Ensure the values range between 5 to 30 ohms. If the reading is outside this range, replace the sensor.
Step 2: Inspect the Wiring
Carefully examine the wiring leading to the O2 sensor. Look for signs of damage such as fraying or melting, which can cause short circuits. Repair any damaged wires or replace the harness if necessary.
Step 3: Test the Heater Circuit Fuse
Locate the fuse box and check the oxygen sensor's heater circuit fuse. A blown fuse can trigger a P0135 code. Replace the fuse if it's damaged.
Step 4: Reset the Engine Control Module (ECM)
To clear the error code, disconnect the car battery for a few minutes. This will reset the ECM. After reconnecting the battery, start your Nissan and drive it to see if the code reappears.
Step 5: Further Diagnostics
If the P0135 code persists, further diagnostics may be required. Consider checking the ECM itself or consulting a professional mechanic to ensure thorough examination and repair.
Common Diagnosis Mistakes
When diagnosing a P0135 code on your Nissan, avoid jumping to conclusions and replacing parts without checking thoroughly. Here are some common mistakes:
- Check the Wiring: The issue mightn't be the oxygen sensor itself. Look at the wiring and connections. Damaged wires or loose connections can cause problems.
- Look for Other Codes: There could be more diagnostic codes present. These might point to other problems affecting the O2 sensor, like fuel system issues.
- Consider Weather Conditions: Very cold weather can impact how the O2 sensor's heater works. Before replacing the sensor, think about whether the weather might be causing the issue.
P0135 Nissan Repair Cost
Repairing a Nissan with a P0135 code involves dealing with a problem in the heater circuit of the oxygen sensor in bank 1 sensor 1. You might need to either fix the heater circuit or replace the oxygen sensor.
Costs can vary based on factors like your Nissan model, labor rates at the garage, and if you choose original parts or aftermarket ones. An aftermarket oxygen sensor usually costs between $20 and $150.
Original parts can range from $100 to $300. Labor charges for replacing it typically fall between $50 and $150.
Overall, repair expenses can be anywhere from $70 to $450. Higher costs usually involve original parts and services from a dealership.
Going for aftermarket parts and a local mechanic might be cheaper. Just make sure the parts fit your Nissan properly.
Related Error Codes on Nissan
When you see the P0135 code on your Nissan, you might also come across other codes that show different issues. Knowing these codes helps you understand your car's overall condition.
| Code | Description |
|---|---|
| P0141 | Problem with O2 Sensor Heater Circuit Bank 1 Sensor 2 |
| P0161 | Problem with O2 Sensor Heater Circuit Bank 2 Sensor 2 |
| P0031 | Low Circuit in HO2S Heater Control Bank 1 Sensor 1 |
| P0051 | Low Circuit in HO2S Heater Control Bank 2 Sensor 1 |
These codes are usually about problems with the oxygen sensor heaters and their connections. P0141 and P0161 are similar to P0135 but affect different sensors. P0031 and P0051 suggest there might be short circuits or not enough voltage in the heater circuits. Check the sensors and wires for any faults or damage. Fixing these issues quickly can help avoid bigger problems with your emissions system and keep your car running well. These sensors help control how your engine mixes fuel and air, which affects how efficiently it runs and how much it pollutes.
Can I drive safely with P0135 Nissan?
It's not safe to keep driving your Nissan with a P0135 code.
This code means there's a problem with the oxygen sensor. Your car uses more fuel, and it might damage the engine.
Also, you could fail an emissions test, so fix it soon.
People Also Ask
What Is the Average Lifespan of an O2 Sensor in Nissan Models?
An O2 sensor in Nissan cars usually lasts about 100,000 miles. But this can change depending on how and where you drive. If you drive in tough conditions or have different habits, the sensor might last a shorter or longer time.
How Does Weather Affect the O2 Sensor Heater Circuit?
Cold weather or too much moisture can make the O2 sensor heater in your car not work right. This can slow it down or break parts, causing more pollution and making the car run badly.
Can a P0135 Code Trigger Issues in Other Car Systems?
Yes, a P0135 code can cause problems in other parts of the car. It might make your car use more fuel and create more pollution. If not fixed, it could also lead to more issues with the engine or exhaust system.
Are Aftermarket O2 Sensors Reliable for Fixing P0135?
Yes, aftermarket O2 sensors can fix the P0135 issue if you pick good ones. Cheap sensors might not work well and can cause more problems. So, it's important to buy from trusted brands to make sure your car runs smoothly.
What Are the Environmental Impacts of a Malfunctioning O2 Sensor?
A broken O2 sensor in your car can cause more pollution because it makes the car use too much fuel. This means the car releases more harmful gases into the air, which is bad for the environment. It also makes the car less fuel-efficient.