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P1704 Nissan Code - Transmission Control Module

Quick Answer

The P1704 code in a Nissan vehicle relates to the Transmission Control Module (TCM). Common causes include Faulty TCM: The TCM itself may be faulty, causing communication issues and malfunctions within the transmission system, Wiring Issues: Damage to the wiring harness connecting the TCM to other components can disrupt communication and lead to the P1704 code, Sensor Malfunction: A malfunctioning transmission sensor can provide incorrect data to the TCM, triggering the code. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1704 Nissan indicates Transmission Control Module.
Common causes
Common causes include Faulty TCM: The TCM itself may be faulty, causing communication issues and malfunctions within the transmission system, Wiring Issues: Damage to the wiring harness connecting the TCM to other components can disrupt communication and lead to the P1704 code, Sensor Malfunction: A malfunctioning transmission sensor can provide incorrect data to the TCM, triggering the code.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1704 Nissan Description

The P1704 code in a Nissan vehicle relates to the Transmission Control Module (TCM). The TCM is responsible for controlling the transmission system in the vehicle, including shifting gears, torque converter lockup, and other transmission functions. When this code is triggered, it indicates that there is a malfunction or communication issue within the TCM. This can lead to various performance issues and potentially cause long-term damage to the transmission system if not addressed promptly.

OBDII Code P1704 Nissan - Transmission Control Module
P1704 Nissan Code - Transmission Control Module

Common Causes of P1704 Nissan

  1. Faulty TCM: The TCM itself may be faulty, causing communication issues and malfunctions within the transmission system.
  2. Wiring Issues: Damage to the wiring harness connecting the TCM to other components can disrupt communication and lead to the P1704 code.
  3. Sensor Malfunction: A malfunctioning transmission sensor can provide incorrect data to the TCM, triggering the code.
  4. Low Transmission Fluid: Insufficient transmission fluid levels can cause the transmission to operate improperly, leading to TCM issues.
  5. Software or Firmware Update: Sometimes, the TCM may require a software or firmware update to address bugs or glitches that could trigger the code.

Symptoms of P1704 Nissan

  1. Erratic Shifting: The vehicle may experience erratic or harsh shifting between gears.
  2. Stuck in Gear: The transmission may get stuck in a single gear and not shift properly.
  3. Slipping Gears: The transmission may slip in and out of gear, causing a lack of power and acceleration.
  4. Engine Stalling: The engine may stall when coming to a stop due to transmission issues.
  5. Illuminated Check Engine Light: The Check Engine Light may illuminate on the dashboard to indicate a problem with the transmission system.

How to Fix P1704 Nissan

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and pinpoint the exact cause of the TCM malfunction.
  2. Inspect Wiring and Connections: Check the wiring harness and connections to ensure there are no loose or damaged wires causing the issue.
  3. Test Transmission Sensors: Test each transmission sensor to determine if any are faulty and need replacement.
  4. Update TCM Software: If required, update the TCM software or firmware to address any bugs or glitches causing the code.
  5. Replace TCM: If all other steps fail to resolve the issue, the TCM may need to be replaced to restore proper transmission function.

Cost to Fix P1704 Nissan

The cost of repairing a P1704 code in a Nissan vehicle can vary depending on the exact cause of the issue and the labor rates in your area. Typically, the cost of replacing a faulty TCM can range from $500 to $1000, including parts and labor. However, additional costs may apply if other components need to be replaced or if extensive diagnostics are required. It's recommended to consult with a professional mechanic to get an accurate estimate based on your specific vehicle and location. Remember that labor rates can vary significantly, so it's wise to shop around for the best deal.

What does this mean?

Tech Notes for P1704 Nissan

There is a Factory Service Bulletin for all 2003–2010 Nissan vehicles with 5-Speed A/T RE5R05A Transmission:
2003–2010 Nissan RE5R05A Transmission Factory Service Bulletin OBDII Code P1704

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1704 Nissan Code

1. What are the common symptoms of OBDII code P1704 in a Nissan related to the Transmission Control Module?

Common symptoms include harsh shifting, delayed shifting, the transmission stuck in a single gear, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P1704 in a Nissan?

The code P1704 in a Nissan is typically caused by issues with the Transmission Control Module (TCM), faulty wiring or connectors, or internal transmission problems.

3. How can I diagnose OBDII code P1704 in my Nissan related to the Transmission Control Module?

Diagnosing code P1704 involves using a scan tool to retrieve the specific fault codes, checking the wiring and connectors for any damage or corrosion, and performing a thorough inspection of the transmission system.

4. What are some repair tips for addressing OBDII code P1704 in a Nissan?

Repair tips may include checking and repairing any damaged wiring or connectors, ensuring proper connection to the TCM, and considering a TCM replacement if necessary.

5. Can I drive my Nissan with OBDII code P1704 related to the Transmission Control Module?

It is not recommended to drive your Nissan with code P1704 as it can lead to further damage to the transmission system. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P1704 in a Nissan?

The cost of repairing code P1704 in a Nissan can vary depending on the exact cause of the issue, but it may involve expenses related to parts replacement, labor, and diagnostic fees.

7. Is it possible to reset OBDII code P1704 in a Nissan without fixing the underlying issue?

Resetting the code without addressing the underlying problem will only temporarily clear the error code. The issue will likely resurface until properly repaired.

8. Can a DIY enthusiast repair OBDII code P1704 in a Nissan related to the Transmission Control Module?

While some basic diagnostic steps can be taken by a knowledgeable DIY enthusiast, addressing code P1704 often requires specialized tools and expertise best handled by a professional mechanic.

9. How long does it usually take to repair OBDII code P1704 in a Nissan?

The repair time for code P1704 in a Nissan can vary depending on the complexity of the issue and the availability of parts. It may take a few hours to a full day in some cases.

10. What happens if OBDII code P1704 in a Nissan related to the Transmission Control Module is left unaddressed?

Leaving code P1704 unaddressed can lead to more severe transmission problems, increased repair costs, and potential safety hazards while driving. It is crucial to resolve the issue promptly.

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