P1765 on 1997-2011 Dodge Dakota — Transmission 12-Volt Supply Relay Control Circuit
1 vehicles · 1 makes · $200-$800 repair
Most Reported On
P1765 is an OBD-II diagnostic trouble code meaning “Transmission 12-Volt Supply Relay Control Circuit.” This manufacturer-specific code (commonly Ford) indicates a problem in the control circuit for the transmission's 12-volt supply relay, which powers the transmission solenoids and control components. The computer detected that this supply circuit is not energizing or responding correctly. Because the transmission solenoids depend on this feed, you may experience harsh shifts, no shifts, or the transmission dropping into a limp/failsafe mode. It is generally an electrical/relay/wiring fault rather than internal mechanical transmission failure. This code is most commonly reported on 1997-2011 Dodge Dakota, with repair costs ranging from $200 to $800.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1765, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P1765 mean?
P1765 stands for "Transmission 12-Volt Supply Relay Control Circuit." This manufacturer-specific code (commonly Ford) indicates a problem in the control circuit for the transmission's 12-volt supply relay, which powers the transmission solenoids and control components. The computer detected that this supply circuit is not energizing or responding correctly. Because the transmission solenoids depend on this feed, you may experience harsh shifts, no shifts, or the transmission dropping into a limp/failsafe mode. It is generally an electrical/relay/wiring fault rather than internal mechanical transmission failure.
What are the most common causes of P1765?
The most common causes of P1765 are: Faulty transmission power relay, Open or shorted wiring in the relay control circuit, Corroded or loose connector or ground, Blown fuse on the transmission supply circuit, Faulty TCM/PCM relay driver, Internal solenoid short loading the supply. The specific cause varies by vehicle.
How much does it cost to fix P1765?
Repair costs for P1765 range from $200 to $800, depending on the vehicle and root cause.
Which vehicles are affected by P1765?
Au7o has documented P1765 across 1 vehicle models from 1 manufacturers: Dodge.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.