By Ezra Lane When your Nissan displays the C1142 code, it indicates an issue with the pump motor relay circuit in the Anti-lock Braking System (ABS), which could comprise your vehicle's braking efficiency and safety. This problem necessitates checking the relay's function, wiring integrity, and voltage supply to ensure the reliability and safety of your braking system. Symptoms include a lit brake warning light, a soft brake pedal, and increased stopping distances—signs that shouldn't be ignored due to the risk of brake failure. Addressing the error promptly involves using tools like a multimeter and OBD-II scanner and might cost you between $150 to $300. If you investigate these elements, you'll uncover even more about maintaining your braking system's reliability and safety.
C1142 Nissan Code Meaning
The C1142 Nissan code indicates an issue with the brake pump motor relay circuit, affecting the ABS.
Check relay function, wiring integrity, and voltage supply to the pump motor.
These steps can identify and resolve the problem, ensuring the braking system's reliability and safety.
Error Code C1142 Symptoms
When the C1142 Nissan error code shows up, you might notice these signs:
- Brake warning light is on: This light on your dashboard signals a braking system issue.
- Brake pedal feels soft or spongy: The pedal feels different, indicating a problem with brake fluid pressure.
- Braking takes longer: Stopping the car requires more effort, which can be concerning.
- ABS isn't working right: The Anti-lock Braking System may not be functioning properly, affecting car control.
- Brakes might fail: In severe cases, there could be a risk of brake failure.
If you experience any of these problems, have your car's braking system checked to avoid accidents or further damage.
Causes of Nissan C1142 Fault Code
When your Nissan shows the C1142 code, it means there's a problem with the pump motor relay circuit. This part is key for the brake system's hydraulic pump.
Here's what might be causing it:
- Bad Pump Motor Relay: The relay mightn't give the power needed, causing issues.
- Wiring Problems: Worn or rusty wires can mess up the electrical connections for the relay.
- ABS Control Module Issues: This module tells the relay what to do. If it's not working right, the relay mightn't work either.
- Low Battery Power: Not enough power can stop the relay from working properly.
- Environmental Damage: Extreme weather can harm the relay or its wires.
These problems can make the C1142 code pop up.
To fix it, you need to find out exactly what's wrong with your car's brake system.
Tools Needed to Diagnose
To figure out what's causing the Nissan C1142 error, you'll need some specific tools. These tools will help you find issues in the pump motor relay circuit.
Here's what you should have:
- Multimeter: This checks if electricity is flowing correctly and if the voltage is right.
- OBD-II Scanner: This reads error codes and shows live data. You can use it to check the C1142 code and see how the system is working after fixes.
- Wire Strippers and Connectors: These are handy if there are problems with the wiring. They help fix or connect wires properly.
- Brake Fluid Pressure Gauge: This measures the brake fluid pressure, which might be affected if the pump motor relay has issues.
- Basic Hand Tools: Tools like wrenches and screwdrivers will help you get to and replace any broken parts.
With these tools, you can check each part of the system step by step and fix what's wrong.
How to Fix C1142 Nissan Error Code – Step by Step
Step 1:
Use an OBD-II scanner to confirm the presence of the C1142 Nissan error code and identify any additional issues.
Step 2:
Examine the brake fluid pressure sensor and its connections carefully. Look for signs of damage, such as frayed wires or loose connectors, and check for corrosion that might impair the sensor's function.
Step 3:
Verify the brake fluid level. Ensure it's both full and clean. Contaminated or low fluid could affect the sensor's accuracy, leading to the activation of the C1142 code. Replace or top up the fluid as necessary.
Step 4:
Use a multimeter to test the brake fluid pressure sensor. Ensure it shows the proper resistance and functionality according to the manufacturer's specifications. Replace the sensor if it fails these tests.
Step 5:
Clear the error code from your vehicle's system using the OBD-II scanner and take your car for a test drive. This ensures all issues are resolved and the brake system is functioning correctly.
Common Diagnosis Mistakes
Many common mistakes happen when diagnosing the C1142 Nissan error code. These can often lead to extra costs and longer vehicle downtime. Knowing these errors can help solve the problem faster.
- Ignore the Brake Fluid Pressure Sensor: Sometimes, the brake fluid pressure sensor's condition isn't checked, which can lead to a wrong diagnosis.
- Focus on the ABS Module Too Soon: Technicians might look at the ABS module first without checking the wires and connectors of the brake fluid pressure sensor.
- Misread Low Brake Fluid Levels: Low brake fluid levels may be seen just as a symptom, but they can actually be a cause.
- Skip Electrical Output Tests: Not using a multimeter to test the sensor's electrical output before changing parts can create more problems and raise costs.
- Forget Post-Repair Testing: Not clearing the Diagnostic Trouble Code (DTC) and testing the system again can give a false sense of repair success.
C1142 Nissan Repair Cost
Repairing the C1142 Nissan code, which relates to the brake fluid pressure sensor, usually costs between $150 and $300.
If there are other problems with the brakes, like damaged brake lines or calipers, the cost can go up.
Labor costs can add another $100 to $200, depending on the mechanic's rates.
It's a good idea to compare prices from different shops to find a fair price.
The cost of parts can vary based on your car model and part quality.
Using better parts might help avoid future issues.
If the brake fluid is dirty, changing it will add $50 to $100 to your bill.
Ask your mechanic for a detailed cost breakdown.
This helps you know what you're paying for and why.
Fixing these problems quickly keeps your car safe.
Related Error Codes on Nissan
When you see a C1142 code on your Nissan, there might be other related codes showing problems in the brake system. These codes are important because they point to systems that work together to help your car stop safely.
Codes like C1140, C1143, and C1144 are linked to the same parts affected by C1142. Each code tells you about a different issue, but together they show bigger problems that need fixing to keep your car safe.
Here's what each code means:
| Code | Description | Impact on Brake System |
|---|---|---|
| C1140 | Problem with the ABS motor relay circuit | Can make the brakes work poorly |
| C1143 | Issue with the brake fluid pressure sensor | Often comes with C1142; affects how sensors work |
| C1144 | Problem with the hydraulic control unit | Might harm the whole brake system |
Also, watch out for C1188. This code shows general problems with the ABS system, causing similar issues to those from the C1142 code. Fixing these codes helps keep your brakes working well and ensures safety while driving.
Can I drive safely with C1142 Nissan?
It's not safe to drive your Nissan with the C1142 code.
This means there's a problem with your brakes, which could lead to accidents.
You should fix it right away.
Take your car to a mechanic to make sure everything is okay.
People Also Ask
What Is the Average Lifespan of a Pump Motor Relay in a Nissan?
A pump motor relay in a Nissan usually lasts between 10 to 15 years. But things like how you drive and take care of your car can change this. Checking it regularly can help it last longer and stop it from breaking too soon.
How Does Weather Affect the C1142 Nissan Code?
Weather can change how your car's brake system works. In cold weather, the brake fluid thickens. High humidity can add moisture, and quick temperature changes might harm parts. These changes can make sensors act weird, causing error codes like the C1142 Nissan code.
Can Aftermarket Accessories Trigger the C1142 Nissan Code?
Yes, adding aftermarket parts can sometimes cause the C1142 code in a Nissan. If these parts make the car's electrical system too busy or mess with the brakes, it could lead to problems with the brake fluid pressure sensor.
What Are Alternative Diagnostic Methods for C1142 Without Professional Tools?
To find out what's wrong with C1142 without fancy tools, first, check if the brake fluid is full. Look at the wires to see if they're broken. Use a multimeter to check if the wires connect right. Clear any codes with a simple OBD-II scanner.
Are There Any Recalls Related to the C1142 Nissan Code?
As of now, there are no recalls just for the C1142 code in Nissan cars. It's a good idea to check the NHTSA website or Nissan's site often to see if there are any new recalls.