AutoCodes – RAM – P0765 RAM

P0765 RAM Code - Underdrive Solenoid Circuit Fault

Quick Answer

Underdrive (UD) clutch solenoid valve is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the Park/Neutral Position (PNP) Switch, Vehicle Speed and Engine Control Module (ECM) (throttle opening). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty UD solenoid valve. 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: P0765 RAM indicates Underdrive Solenoid Circuit Fault.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty UD solenoid valve.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,480

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0765 RAM Description

Underdrive (UD) clutch solenoid valve is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the Park/Neutral Position (PNP) Switch, Vehicle Speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position. The P0765 code is detected when the ECM detects an improper voltage drop when it tries to operate the solenoid valve.

OBDII Code P0765 RAM - Underdrive Solenoid Circuit Fault - AutoCodes.com — P0765 RAM Code - Underdrive Solenoid Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P0765 RAM?

Low transmission fluid level
Dirty transmission fluid
Faulty UD solenoid valve
UD solenoid valve harness is open or shorted
UD solenoid valve circuit poor electrical connection

How to Fix the DTC P0765 RAM?

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 P0765 RAM 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.

Need more information about the P0765 RAM code?

Need more information on how to fix the P0765 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0765 RAM code diagnosed by a professional: Find a repair shop in your area

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 P0765 RAM Code

1. What are common symptoms of OBDII code P0765 RAM (Underdrive Solenoid Circuit Fault)?

- Common symptoms include harsh shifting, delayed shifting, erratic shifting, and the transmission getting stuck in a single gear.

2. What are the possible causes of OBDII code P0765 RAM?

- The code P0765 RAM can be caused by issues with the underdrive solenoid, such as a faulty solenoid, a short or open circuit in the wiring, a defective transmission control module (TCM), or low transmission fluid levels.

3. How can I diagnose the OBDII code P0765 RAM?

- Diagnosing the code P0765 RAM involves using a scan tool to retrieve the code, checking the transmission fluid level and condition, inspecting the wiring and connectors related to the underdrive solenoid, and testing the solenoid for proper operation.

4. Can I continue to drive my vehicle with OBDII code P0765 RAM?

- It is not recommended to continue driving your vehicle with the code P0765 RAM as it can lead to further damage to the transmission and other components. It's best to address the issue promptly.

5. How can I repair OBDII code P0765 RAM?

- Repairing the code P0765 RAM typically involves replacing the underdrive solenoid if it's found to be faulty, repairing any damaged wiring or connectors, and ensuring the transmission fluid is at the correct level and in good condition.

6. Is it possible to clear the OBDII code P0765 RAM without fixing the underlying issue?

- Clearing the code without fixing the underlying issue may temporarily turn off the Check Engine Light, but the problem will likely reoccur. It's important to address the root cause to prevent further issues.

7. Can a DIY enthusiast fix OBDII code P0765 RAM at home?

- While some DIY enthusiasts may have the skills to diagnose and replace the underdrive solenoid or repair wiring issues, it's recommended to seek professional help for transmission-related problems due to their complexity.

8. How much does it typically cost to repair OBDII code P0765 RAM?

- The cost of repairing the code P0765 RAM can vary depending on the underlying issue, parts needed, and labor rates. On average, the cost can range from $200 to $500 for parts and labor.

9. Are there any preventive maintenance tips to avoid OBDII code P0765 RAM?

- To help prevent the code P0765 RAM, it's important to regularly check and maintain the transmission fluid level, address any leaks promptly, and follow the manufacturer's recommended maintenance schedule for your vehicle.

10. Can weather conditions or driving habits trigger OBDII code P0765 RAM?

- Extreme weather conditions or harsh driving habits can potentially contribute to transmission issues that may trigger the code P0765 RAM. It's important to drive your vehicle gently and maintain it properly to reduce the risk of such issues.