By Ezra Lane You're likely facing the P0137 code on your Nissan because the O2 Sensor in Bank 1 Sensor 2 has detected low voltage. This issue often results from a faulty oxygen sensor, damaged wiring, or exhaust leaks. It's crucial to address this to restore your vehicle's efficiency and emissions standards. Typically, you'll experience symptoms like a lit Check Engine Light, decreased fuel economy, rough idling, loss of power, and higher emissions. Repair involves checking and potentially replacing the sensor or repairing the wiring. Addressing this code promptly prevents further damage and ensures optimal vehicle performance. As you explore deeper, you'll understand the subtleties of handling this issue effectively.
P0137 Nissan Code Meaning
The P0137 Nissan code signals a low voltage issue in the Bank 1 Sensor 2 oxygen sensor circuit.
Causes include a faulty oxygen sensor, damaged wiring, or exhaust leaks.
Fixing the problem, such as replacing the sensor or repairing wiring, restores engine performance and emission standards.
Error Code P0137 Symptoms
When your car's O2 sensor circuit shows low voltage on Bank 1, Sensor 2, it can lead to several noticeable problems with your vehicle:
- Check Engine Light: You'll see the check engine light come on. This light tells you there's an issue that needs attention.
- Decreased Fuel Economy: You might need to fill up your gas tank more often. The sensor problem affects how your car mixes fuel, making it less efficient.
- Rough Idling: The engine mightn't idle smoothly. It could sputter or seem like it might stall because it's not getting the right information to run properly.
- Loss of Power: When you try to speed up, the car might feel sluggish. This happens because the engine isn't getting accurate data to perform well.
- Increased Emissions: You might notice more smoke or a strange smell from the exhaust. This issue can cause your car to fail emissions tests due to more pollutants.
Causes of Nissan P0137 Fault Code
Several things can make the P0137 code show up in your Nissan, mostly linked to the oxygen sensor and its surroundings. Knowing these can help you fix the problem faster.
- Bad Oxygen Sensor: Often, the Heated Oxygen Sensor (HO2S) isn't working right. If it doesn't give correct voltage readings to the Engine Control Module (ECM), this code might appear.
- Broken Wires or Loose Connections: If the wires or connectors in the sensor circuit are damaged or loose, it can mess up the electrical signals, causing low voltage errors.
- Exhaust Leaks: If there are leaks in the exhaust, the HO2S might read oxygen levels wrong, sending bad data to the ECM.
- Air Leaks in Engine: Leaks in the engine can change the air-fuel mix, possibly causing the oxygen sensor to give wrong readings and trigger the P0137 code.
- Faulty ECM: Sometimes, the sensor might be fine, but the ECM could misread it, showing a false P0137 code.
Fixing these problems quickly can keep your car running smoothly.
Tools Needed to Diagnose
To figure out what's causing the Nissan P0137 error code, you'll need a few specific tools. These tools help you check things accurately and fix the problem. Here's what you'll need:
- Digital Multimeter: Use this to check the voltage from the Heated Oxygen Sensor (HO2S). It tells you if the sensor is working right.
- OBD-II Scanner: This tool reads and clears codes from the car's computer. It shows what the computer says about the issue.
- Wire Strippers and Connectors: If there are wiring problems, these help you fix them. They make sure the wires are connected properly.
- Smoke Machine: This helps find leaks in the exhaust system. Leaks can mess up the sensor's readings.
- Basic Toolkit: Includes sockets and wrenches. You'll need these to take out and put in the sensor if that's needed.
With these tools, you can check and fix the P0137 code and get your car running smoothly again.
How to Fix P0137 Nissan Error Code – Step by Step
Step 1:
Start with your OBD-II scanner. Connect it to your vehicle's diagnostic port, usually found under the dashboard, to verify the presence of the P0137 code and identify any other related issues. This scan provides a clear baseline for troubleshooting.
Step 2:
Perform a visual inspection of the wiring and connectors leading to the Heated Oxygen Sensor (HO2S) on Bank 1, Sensor 2. Look for signs of wear, damage, or corrosion, and ensure all connections are secure.
Loose connections can result in incorrect voltage readings. Repair or replace any damaged parts before proceeding.
Step 3:
Inspect the exhaust system for leaks. Small gaps or holes can cause erroneous sensor readings. Repair any leaks you discover to ensure the sensor operates accurately.
Step 4:
If the wiring and exhaust system are in good condition, use a multimeter to test the HO2S. Connect the multimeter and verify the sensor's voltage output. Compare the readings with the manufacturer's specifications.
Step 5:
If the sensor fails to meet the specified voltage output, replace the HO2S. Once replaced, clear the error code using the OBD-II scanner and take the vehicle for a test drive to confirm the issue has been resolved.
Common Diagnosis Mistakes
Many mechanics miss wiring problems when checking the P0137 code. They often rush to swap out the oxygen sensor, thinking it's faulty. But this can lead you the wrong way.
Watch out for these:
- Wiring Problems: Check the wires going to the O2 sensor. Damage or rust can make the sensor give low voltage signals, seeming like it's broken.
- Exhaust Leaks: Look for leaks in the exhaust. These can mess with the sensor's signals, causing wrong diagnoses.
- Connector Wear: Look at the connectors for wear or rust. Bad connections can show the same problems as a bad sensor.
- ECM Issues: Sometimes, the Engine Control Module (ECM) may misread the sensor signals and cause the P0137 code.
- Visual Inspection Neglect: Examine the exhaust system closely. Missing visible leaks or damage can mess up sensor readings.
Avoid these mistakes for a more accurate diagnosis of the P0137 code.
P0137 Nissan Repair Cost
When dealing with a P0137 code on your Nissan, fixing it can cost between $200 and $400. The oxygen sensor itself usually costs $100 to $200. Labor adds another $100 to $200. If more diagnostics are needed to find the problem, this might increase the cost.
The price can change depending on your car's model and where you go for repairs. Some places charge more for labor. It's not just about replacing the sensor; the mechanic needs to ensure the new part works well with your Nissan.
They'll also check for other issues that might cause the P0137 code. Consider checking different repair shops to find the best price, especially if the fix can wait.
But ensure you use good parts and a skilled mechanic. Going for a cheaper fix might end up costing more if the main problem isn't solved.
Related Error Codes on Nissan
If your Nissan shows the P0137 code, you might also see codes like P0136 and P0141. These codes relate to issues with the oxygen sensor system.
| Code | Description |
|---|---|
| P0136 | Problem with O2 Sensor Circuit (Bank 1 Sensor 2) |
| P0141 | O2 Sensor Heater Circuit Issue (Bank 1 Sensor 2) |
| P0138 | O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) |
You may also notice P0420, which means the catalytic converter isn't working well. This can happen because of bad readings from a faulty O2 sensor. Another code, P0300, points to multiple cylinder misfires, often due to a bad air-fuel mix from inaccurate sensor data.
Check for these codes in the ECM to understand the problem and fix it.
Can I drive safely with P0137 Nissan?
Driving with a P0137 code on your Nissan isn't safe.
It means there's a problem with the oxygen sensor, which can cause engine issues like misfires or stalling. This makes driving dangerous and can also waste more fuel.
It's best to fix it soon.
People Also Ask
How Does Altitude Affect the P0137 Error Code in Nissans?
The P0137 error code in Nissans can happen at higher altitudes because the air is thinner. This thin air affects how the car mixes fuel and air. The O2 sensor might read low voltage, causing the error.
Are Aftermarket O2 Sensors Reliable for Fixing P0137?
Aftermarket O2 sensors can work well to fix a P0137 error if you buy good brands that match the original parts. Make sure to put them in the right way to keep your car running smoothly without more problems.
What Impact Does P0137 Have on Fuel Efficiency?
If you have a P0137 error, your car might use 10-20% more fuel because the engine isn't working right. This happens because the air and fuel mix gets messed up. Fixing the error can help your car run better and use less fuel.
Can a Faulty Thermostat Cause the P0137 Code?
A bad thermostat won't directly cause the P0137 code. It can change engine temperature, which might affect fuel and exhaust mix. But the main issue is likely with the oxygen sensor or its wires. Check those parts to fix the problem.
Does Weather Influence the Occurrence of the P0137 Code?
Yes, weather can cause the P0137 code. Very hot or cold temperatures, high humidity, and big storms can change how car sensors work. These changes might cause low voltage in the oxygen sensor, leading to the P0137 trouble code.