By Ezra Lane The P1702 Nissan code indicates a malfunction in the Transmission Control Module (TCM) RAM and the transmission range switch circuit. Symptoms often include erratic shifting, difficulty engaging or disengaging gears, and activation of the Check Engine Light. Common causes include misalignment of the transmission range switch, wiring issues, and TCM software glitches. Diagnostic tools such as an OBD-II scanner and digital multimeter are essential, with repair costs generally ranging from $400 to $1,100. Immediate professional evaluation is crucial to ensure vehicle safety and proper functioning. Further detailed insights can enhance your understanding of this issue.
P1702 Nissan Code Meaning
The P1702 Nissan code signifies a malfunction in the Transmission Control Module (TCM) RAM, affecting gear shifting and torque converter lock-up.
Causes include electrical issues, software glitches, low battery voltage, extreme temperatures, and water damage.
Diagnosis may require checking connections or replacing the TCM, with costs between $400 and $1100.
Error Code P1702 Symptoms
Erratic shifting is a common issue linked to the P1702 Nissan code. This can lead to jerky or slow gear changes, making it hard to drive smoothly.
Drivers might also notice transmission slipping. This means the car can lose power unexpectedly or shift out of gear too soon when speeding up. Such slipping can be dangerous, especially on highways or when merging into traffic.
The Check Engine Light often turns on with the P1702 code. This light indicates there's a problem with the transmission control system. It's a sign that drivers should look into the issue.
Poor fuel efficiency may follow because the transmission works harder than it should due to improper shifting. In serious cases, the transmission might overheat, which could cause major damage if not fixed quickly.
Key symptoms to watch for include:
- Jerky or slow gear changes
- Transmission slipping while speeding up
- Check Engine Light on
Being aware of these symptoms can help in identifying and fixing problems early, keeping the vehicle in good shape.
Causes of Nissan P1702 Fault Code
The P1702 fault code in Nissan vehicles often points to problems in the Transmission Range Switch circuit. This code means the Transmission Control Module (TCM) has trouble figuring out what gear the vehicle is in.
Here are some common reasons for the P1702 code:
- Transmission Range Switch Issues: The switch may be misaligned or not working properly. This can happen due to regular wear and tear or if it was not installed correctly.
- Wiring Problems: Damaged wires or poor connections can cause intermittent signals. This disrupts communication in the Transmission Range Switch circuit, leading to the fault code.
- TCM Software Glitches: If the TCM has outdated software or programming issues, it can struggle to communicate effectively with the Transmission Range Switch.
Environmental factors can also affect the Transmission Range Switch. Things like moisture, extreme temperatures, or harsh conditions can damage the switch or its wiring.
Addressing these issues quickly can help ensure your vehicle runs smoothly and the transmission operates correctly.
Tools Needed to Diagnose
To diagnose the P1702 code in Nissan vehicles, you need specific tools. These tools help you find problems accurately and efficiently.
Here's a list of the tools you will need:
- Digital Multimeter: Use this tool to measure voltage and resistance in the Transmission Control Module (TCM) circuit. It helps you identify electrical issues that might cause the P1702 code.
- OBD-II Scanner: This scanner reads and clears diagnostic trouble codes (DTCs) from the car's computer. It gives you information about how the TCM is working, which helps you understand the P1702 code better.
- Wiring Diagram: Having a specific wiring diagram is important for finding the Transmission Range Switch circuit. This diagram helps you track down wiring problems that could be causing the issue.
Additionally, a scan tool that shows live data can help you monitor TCM parameters in real time. This feature lets you spot any unusual behavior that might lead to the P1702 code.
Using these tools will help you diagnose the problem thoroughly.
How to Fix P1702 Nissan Error Code – Step by Step
To effectively address the P1702 Nissan error code, follow this systematic step-by-step approach:
Step 1:
Use a diagnostic scanner to confirm the P1702 error code. Check for any additional codes that may indicate related problems with the transmission range switch circuit.
Step 2:
Conduct a visual inspection of the wiring and connectors connected to the Transmission Control Module (TCM). Look for signs of damage, corrosion, or loose connections that could affect the performance of the transmission system.
Step 3:
If no physical issues are found, consider reprogramming or updating the TCM software to eliminate any potential glitches that may be causing the error code.
Step 4:
Test the transmission range switch for proper operation. If the switch is found to be faulty, it must be replaced, as it is essential for relaying the current gear position to the TCM.
Step 5:
After completing any necessary repairs or replacements, clear the error codes from the vehicle's computer. Take the vehicle for a test drive to ensure the transmission operates smoothly and verify that the P1702 code does not reappear.
Common Diagnosis Mistakes
Misdiagnosing the P1702 Nissan error code can result in unnecessary repairs and higher costs. A common mistake is to quickly decide that the Transmission Control Module (TCM) is faulty without checking the transmission range switch and its wiring first. This can waste time and money.
Sometimes, technicians forget to check the battery voltage and ground connections. These are important for the TCM to work properly. Faulty connections can create false codes, leading to confusion about the real problem.
Other frequent errors in diagnosis include:
- Not visually inspecting the transmission range switch for damage or corrosion.
- Assuming the TCM is broken without checking if a software issue can be fixed with an update or a reset.
- Relying only on diagnostic trouble codes without taking the vehicle for a test drive to see how the transmission actually behaves.
These mistakes show why a thorough diagnostic process is necessary. By carefully checking all possible issues, technicians can find the real cause of the problem. This saves time and helps keep repair costs down.
Good diagnostics improve repair efficiency and keep vehicles running reliably.
P1702 Nissan Repair Cost
Accurate diagnostics help identify the cause of the P1702 Nissan code and estimate repair costs. The main repair involves replacing the Transmission Control Module (TCM). The cost for the TCM usually ranges from $300 to $800, depending on the Nissan model.
Labor costs also add to the total. Diagnosing and replacing the TCM can cost an extra $100 to $300. This means that total repair costs for a P1702 code typically range from $400 to $1,100, including parts and labor.
You may also face diagnostic fees, which can vary from $50 to $150 based on the repair shop.
To get a clear idea of costs, it's a good idea to get estimates from several repair shops. This helps you understand potential expenses and the quality of service. Different shops may have varying labor rates, warranty options on parts, and technician expertise, all of which impact the final cost for fixing the P1702 Nissan code.
Related Error Codes on Nissan
When checking the P1702 code on Nissan vehicles, look for other error codes that might help explain issues with the transmission system. These codes often show problems related to the transmission range switch and its parts.
| Error Code | Description | Impact on Transmission |
|---|---|---|
| P0705 | Transmission Range Sensor Circuit Malfunction | Affects how gears are selected |
| P0706 | Transmission Range Sensor Circuit Range/Performance Problem | Shows performance issues |
| P1701 | Transmission Control Module Range Performance Problem | Points to problems with the TCM's interaction |
| P0720 | Output Speed Sensor Circuit Malfunction | Disrupts speed signal processing |
| P1703 | Transmission Control Module Communication Circuit | Indicates communication issues |
Address all these related codes together for the best diagnosis and repair. Each code gives important information about the transmission system. If you ignore any of these codes, it could lead to incomplete repairs and more transmission problems later on. This can affect how your vehicle drives and its safety.
Can I drive safely with P1702 Nissan?
It's not safe to drive a Nissan with a P1702 code.
This code means there might be problems with the transmission, which can cause weird shifting and make it hard to control the car.
It's best to get it checked by a professional.
People Also Ask
What Vehicles Are Most Commonly Affected by P1702 Code?
The P1702 code mostly affects Nissan cars like the Altima, Maxima, Murano, Rogue, and Sentra. These cars were made in the early 2000s and have a special type of transmission called Continuously Variable Transmission, or CVT for short.
Can Environmental Factors Trigger the P1702 Error Code?
Yes, things like very hot or cold weather, water damage, rust from moisture, a weak battery, and dust can mess up car electrical parts. This can lead to problems, including the P1702 error code showing up in your vehicle.
How Does the P1702 Code Affect Vehicle Performance?
The P1702 code can make your car shift gears in a strange way or take longer to change gears. This can make your car use more gas and might hurt the engine or transmission over time if it's not fixed.
Are There Any Recalls Related to the P1702 Code?
As of October 2023, there are no major recalls for the P1702 code. To stay safe, vehicle owners should check for any recalls using the National Highway Traffic Safety Administration website and ask local dealers for the most up-to-date information.
Can P1702 Cause Damage to Other Vehicle Components?
Yes, the P1702 code can cause problems with the transmission. This might lead to issues like rough shifting and overheating. These problems can then hurt other parts of the car, like the engine and drivetrain, making the vehicle work worse and last not as long.