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Summary
  • Your transmission uses shift solenoids to control hydraulic fuel pressure inside the transmission. The P0765 code is logged once the TCM detects an issue with the “D” shift solenoid circuit.
  • Some of the common causes of a P0765 code include a bad transmission valve body, a clogged transmission fluid filter, a failed transmission shift solenoid, and a wiring issue.
  • Some of the symptoms of a P0765 code include increased fuel consumption, engine misfires, and transmission overheating.

Use a scan tool to find the problems that are plaguing your vehicle. If a P0765 code has been triggered, then this article will give you everything you need to know about its definition, common causes, and common symptoms.

What Does the P0765 Code Mean?

The P0765 code is defined as Shift Solenoid “D” Malfunction. The P0765 code is triggered when the transmission control module (TCM) detects a malfunction with the “D” shift solenoid circuit. The transmission uses shift solenoids to control hydraulic fluid pressure inside the transmission. The flow of hydraulic pressure dictates when the transmission will shift gears. These shift solenoids are grouped into shift solenoid circuits and are named A, B, C, and so on.

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image of an old automatic transmission valve body
The P0765 code is triggered when the TCM detects a malfunction with the “D” shift solenoid circuit.

Note: The definition of the P0765 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0765 Code?

If a P0765 code is triggered, then these problems might be the cause:

What are the Common Symptoms of the P0765 Code?

If the P0765 code is triggered, then your vehicle can show the following symptoms:

  • Increased fuel consumption
  • Transmission not shifting properly
  • Transmission overheats
  • The transmission gets stuck in some gears
  • Engine misfires
  • Vehicle enters limp mode
  • Illuminated check engine light
hand on an automatic transmission gear stick
Transmission not shifting properly can also be a sign of a logged P076 code.

How to Diagnose the P0765 Code

It’s best not to try to diagnose P0765 yourself. It’s too complicated for a do-it-yourselfer unless you’re very familiar with the more complex transmissions and transaxles. Transmission work is typically done by specialty technicians who do nothing but transmissions every day.

Transmission work is typically done by specialty technicians who do nothing but transmissions every day.

– Richard McCuistian, ASE Certified Master Automobile Technician

While the P0765 code says that there’s a malfunction with one of the shift solenoid circuits, this isn’t always the case. Fixing this DTC entails determining the root cause, which may require the use of specialized tools and knowledge. If you’re new to DIY repairs, we recommend consulting a professional mechanic.

See also  P0748 Code: Pressure Control Solenoid “A” Electrical

How to Fix the P0765 Code

There isn’t a single solution for the problems that trigger a P0765 code. There are many ways to fix OBD-II codes because they can be caused by many issues. You have to first accurately diagnose the problem before you do any repairs because you might end up fixing a functioning component.

You should only start fixing the problem when you’ve identified the cause. You can use reputable internet repair resources and how-to guides to learn possible solutions. Don’t forget to check out your vehicle’s repair manual whenever you encounter diagnostic trouble codes.

If you don’t have much expertise in diagnosing or correcting error codes, we advise consulting a professional mechanic.

Other Notes About the P0765 Code

There are several diagnostic trouble codes (DTCs) related to P0765 including P0766, P0767, P0768, and P0769. These codes are similar to the P0765 code, which can indicate a transmission-related problem.

About The Authors
Written By Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

NTMS Scientist
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