AutoCodesGeneric – P2859

P2859 Code - Clutch 'A' Pressure Disengagement Performance

Quick Answer

The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Common causes include Low brake solenoid valve, Control valve assembly. 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
P2859 indicates Clutch 'A' Pressure Disengagement Performance.
Common causes
Common causes include Low brake solenoid valve, Control valve assembly.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 40,725
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on Feb 16, 2019
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Code P2859 Description

The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Thus, the clutch pressure is adjusted to be appropriate to the engine load state and vehicle driving state. It becomes possible to finely control the clutch hydraulic pressure with high precision and a smoother shift change characteristic is attained.
OBDII Code P2859 - Clutch 'A' Pressure Disengagement Performance - AutoCodes.com
P2859 Code - Clutch 'A' Pressure Disengagement Performance

What are the Possible Causes of the DTC P2859?

  • Low brake solenoid valve
  • Control valve assembly

How to Fix the DTC P2859?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2859 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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Information for Specific Makes

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 P2859 Code

1. What are common symptoms of OBDII code P2859 (Clutch 'A' Pressure Disengagement Performance)?

- Common symptoms include difficulty shifting gears, slipping clutch, decreased fuel efficiency, and illuminated Check Engine Light.

2. What are possible causes of OBDII code P2859?

- Possible causes include a faulty clutch pressure control solenoid, low transmission fluid level, hydraulic system issues, or a malfunctioning clutch pressure sensor.

3. How can I diagnose OBDII code P2859?

- Diagnosis involves scanning the vehicle's computer for the specific code, checking the transmission fluid level and condition, inspecting the clutch pressure control solenoid, and testing the clutch pressure sensor.

4. Can I continue driving with OBDII code P2859 present?

- It is not recommended to drive with this code present, as it can lead to further damage to the transmission and clutch system.

5. How can I repair OBDII code P2859?

- Repair may involve replacing the faulty clutch pressure control solenoid, fixing any hydraulic system issues, topping up or changing the transmission fluid, or replacing the clutch pressure sensor.

6. Are there any DIY tips for resolving OBDII code P2859?

- DIY tips include checking the transmission fluid level and condition regularly, following the manufacturer's maintenance schedule, and addressing any clutch-related symptoms promptly.

7. What is the typical cost to repair OBDII code P2859 at a mechanic or dealership?

- The cost of repair can vary depending on the specific issue but may range from $200 to $800 at a mechanic or dealership.

8. How long does it take to repair OBDII code P2859?

- The repair time can vary based on the underlying cause, but it may take a few hours to a full day to diagnose and fix the issue.

9. Can OBDII code P2859 be triggered intermittently?

- Yes, this code can sometimes be triggered intermittently, especially if the issue is related to a sporadic fault in the clutch pressure control system.

10. Is it necessary to reset the OBDII system after repairing code P2859?

- Yes, it is recommended to have the OBDII system reset after repairing code P2859 to clear the fault code and ensure proper functioning of the vehicle's transmission system.

Discuss the causes and fixes for P2859 OBDII Code

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