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P0868 Nissan Code - Secondary Pressure Down

Quick Answer

The P0868 code for Nissan vehicles indicates a problem with the secondary pressure in the transmission. Common causes include Low transmission fluid level or poor quality fluid, Faulty transmission pressure control solenoid, Clogged transmission filter. 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
P0868 Nissan indicates Secondary Pressure Down.
Common causes
Common causes include Low transmission fluid level or poor quality fluid, Faulty transmission pressure control solenoid, Clogged transmission filter.
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 06, 2024
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Code P0868 Nissan Description

The P0868 code for Nissan vehicles indicates a problem with the secondary pressure in the transmission. The transmission system relies on hydraulic pressure to engage gears and shift smoothly. When the secondary pressure is down, it can lead to issues with gear shifting, causing the vehicle to experience hesitation, slipping, or harsh shifting. This can ultimately lead to decreased performance, reduced fuel efficiency, and potential damage to the transmission if not addressed promptly.

OBDII Code P0868 Nissan - Secondary Pressure Down
P0868 Nissan Code - Secondary Pressure Down

Common Causes of P0868 Nissan

  1. Low transmission fluid level or poor quality fluid
  2. Faulty transmission pressure control solenoid
  3. Clogged transmission filter
  4. Wiring or electrical issues in the transmission system
  5. Internal transmission damage or wear

Symptoms of P0868 Nissan

  1. Delayed or rough shifting
  2. Transmission slipping
  3. Gear engagement issues
  4. Illuminated transmission warning light
  5. Reduced fuel efficiency

How to Fix P0868 Nissan

  1. Begin by checking the transmission fluid level and quality, ensuring it is at the correct level and not contaminated.
  2. Inspect and possibly replace the transmission pressure control solenoid if it is found to be faulty.
  3. Replace the transmission filter if clogged, as this can restrict fluid flow and lead to pressure issues.
  4. Check for any wiring or electrical problems in the transmission system and repair as needed.
  5. If internal transmission damage is suspected, a professional transmission rebuild or replacement may be necessary.

Cost to Fix P0868 Nissan

The cost of repairing a P0868 code in a Nissan vehicle can vary depending on the specific cause of the issue. In general, the cost of parts such as a transmission pressure control solenoid or a transmission filter can range from $50 to $200. Labor costs can also vary, with rates typically ranging from $80 to $150 per hour. Overall, the total repair cost for this issue could range from $200 to $800 or more, depending on the extent of the repairs needed. It's advisable to consult with a qualified mechanic or transmission specialist for a more accurate estimate based on the specific circumstances of your vehicle.

What does this mean?

Tech Notes for P0868 Nissan

There is a factory service bulletin for the following Nissan Models:

2003 Nissan Murano
2004 Nissan Murano
2005 Nissan Murano
2006 Nissan Murano
2007 Nissan Murano
2003-2007 Nissan Murano Factory Service Bulletin OBDII Code P0868

The service bulletin recommends replacing the transmission valve body and reprogram Transmission Control Module (TCM).

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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 P0868 Nissan Code

1. What are the common symptoms of OBDII code P0868 in a Nissan related to secondary pressure being down?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and the transmission going into limp mode.

2. What are the typical causes of OBDII code P0868 in a Nissan indicating secondary pressure is low?

- The most common causes are a faulty transmission fluid pump, low transmission fluid level, blocked transmission fluid passages, or a malfunctioning transmission pressure control solenoid.

3. How can I diagnose OBDII code P0868 on my Nissan if I suspect an issue with the secondary pressure?

- Diagnosis involves using a scan tool to read the code, checking the transmission fluid level and condition, inspecting for leaks, and testing the transmission pressure control solenoid.

4. Can I continue driving my Nissan with OBDII code P0868 related to low secondary pressure?

- It is not recommended to continue driving the vehicle as it may lead to further damage to the transmission. It's best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P0868 in a Nissan with secondary pressure down?

- Repair tips may include replacing the transmission fluid pump, ensuring the transmission fluid level is correct, flushing the transmission fluid, and checking for any clogs in the transmission system.

6. Is it possible to reset OBDII code P0868 in a Nissan related to low secondary pressure without fixing the underlying issue?

- While you can clear the code temporarily, it is likely to return if the root cause is not addressed. It's essential to fix the problem to prevent further transmission issues.

7. How much does it typically cost to repair OBDII code P0868 in a Nissan due to low secondary pressure?

- The cost varies depending on the specific issue, but it could range from a few hundred to over a thousand dollars for parts and labor.

8. Are there any preventive maintenance steps I can take to avoid encountering OBDII code P0868 in my Nissan?

- Regularly checking and maintaining the transmission fluid level, following the manufacturer's recommended service intervals, and addressing any transmission issues promptly can help prevent this code from appearing.

9. Can a DIY enthusiast with some automotive knowledge fix OBDII code P0868 related to low secondary pressure in a Nissan?

- Depending on the specific cause, some DIY repairs may be possible, such as checking and topping up the transmission fluid. However, more complex issues may require professional expertise.

10. How urgent is it to address OBDII code P0868 indicating low secondary pressure in a Nissan?

- It is essential to address this issue promptly to prevent further damage to the transmission and ensure the safety and reliability of the vehicle.

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