AutoCodes – Generic – P1765

P1765 Code - Transmission 12V Supply Relay Control Conditions

Quick Answer

With the key on or engine running, the Powertrain Control Module (PCM) detects that the transmission control voltage status with the solenoid off was 0v (should be 12v) or was 12v with the solenoid on. Common causes include Faulty Transmission Control Relay, Transmission Control Relay harness is open or shorted, Transmission Control Relay circuit poor electrical connection. 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: P1765 indicates Transmission 12V Supply Relay Control Conditions.
Common causes: Common causes include Faulty Transmission Control Relay, Transmission Control Relay harness is open or shorted, Transmission Control Relay circuit poor electrical connection.
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.

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Code Popularity 49,705

How popular is this code, among other codes? Medium

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 Sep 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1765 Description

OBDII Code P1765 - Transmission 12V Supply Relay Control Conditions - AutoCodes.com — P1765 Code - Transmission 12V Supply Relay Control Conditions

What does this mean?

What are the Possible Causes of the DTC P1765?

Faulty Transmission Control Relay
Transmission Control Relay harness is open or shorted
Transmission Control Relay circuit poor electrical connection

How to Fix the DTC P1765?

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 P1765 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 P1765 code?

Need more information on how to fix the P1765 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1765 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1765 Chrysler — Transmission 12V Supply Relay Control Conditions
P1765 Dodge — Transmission 12V Supply Relay Control Conditions
P1765 Hyundai — TCS-ITM CAN Error
P1765 Jeep — Transmission 12V Supply Relay Control Conditions
P1765 Lexus — Automatic Transmission Pressure Control Shift Solenoid
P1765 Mazda — Automatic Transmission Gear 3-2 Timing Solenoid Malfunction
P1765 Toyota — Automatic Transmission Pressure Control Shift Solenoid

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 P1765 Code

1. What are the common symptoms of OBDII code P1765?

The common symptoms of OBDII code P1765 include issues with shifting gears, transmission slippage, and the transmission going into "limp mode."

2. What are the possible causes of OBDII code P1765?

Possible causes of OBDII code P1765 include a faulty transmission 12V supply relay, damaged wiring or connectors in the relay circuit, or a problem with the transmission control module.

3. How can I diagnose the issue causing OBDII code P1765?

Diagnosing OBDII code P1765 typically involves using a scan tool to retrieve the code, checking the transmission 12V supply relay and related components for any visible damage, and testing the relay's functionality using a multimeter.

4. Can I continue driving with OBDII code P1765 present?

It is not recommended to continue driving with OBDII code P1765 present, as it can lead to further damage to the transmission and potentially unsafe driving conditions.

5. How can I repair OBDII code P1765?

Repairing OBDII code P1765 may involve replacing the faulty transmission 12V supply relay, repairing or replacing damaged wiring or connectors, or addressing any issues with the transmission control module.

6. Are there any DIY tips for fixing OBDII code P1765?

DIY tips for fixing OBDII code P1765 include ensuring all connections are secure, checking for any visible damage to wiring, and consulting the vehicle's repair manual for specific instructions on relay replacement.

7. Can a professional mechanic help in resolving OBDII code P1765?

Yes, a professional mechanic can help diagnose and repair OBDII code P1765 using specialized tools, expertise, and access to technical information specific to your vehicle.

8. Is OBDII code P1765 a serious issue?

OBDII code P1765 should be addressed promptly as it can lead to transmission problems and potential safety hazards if left unresolved.

9. Can weather conditions affect OBDII code P1765?

Extreme weather conditions such as heat or moisture can potentially impact the transmission 12V supply relay and contribute to the triggering of OBDII code P1765.

10. How long does it typically take to fix OBDII code P1765?

The time to fix OBDII code P1765 can vary depending on the exact cause of the issue, but it may take a few hours to a full day for diagnosis and repair.