The OBD2 code P0760 indicates a malfunction with Shift Solenoid C within the transmission control system. This solenoid plays a critical role in managing the hydraulic pressure that activates gear changes in automatic transmissions. When it fails or performs poorly, the transmission may experience issues shifting gears, enter limp mode to protect the system, or skip gears, particularly affecting the vehicle’s overall performance and drivability.
P0760 quick overview
| Meaning | P0760: Shift Solenoid C Fault |
| Is it serious? | Yes, it can lead to significant transmission performance issues, potentially resulting in transmission damage if not addressed. |
| Possible causes | – Faulty shift solenoid C – Wiring or connector issues related to the solenoid – Blockages in the transmission fluid passages – Malfunctions within the transmission control module (TCM) or engine control module (ECM) |
| How to diagnose? | Inspect the shift solenoid and its connections for any signs of damage or corrosion Check the wiring and harness leading to the solenoid for shorts or opens Test the solenoid’s resistance and operation with a multimeter or scan tool Examine the transmission fluid for cleanliness and level; replace if dirty or low Consider replacing the solenoid if diagnostics confirm it’s faulty Examine the TCM/ECM for any related issues, especially if reprogramming or replacement has been attempted |
P0760 Meaning
For those who might not be familiar with the intricacies of vehicle mechanics, imagine your car’s transmission as a complex dance of gears and clutches that shift to keep the car moving smoothly. Shift Solenoid C is like a choreographer that controls part of this dance, telling the transmission when to change gears.
If this choreographer gets confused (P0760 code), the dance can stumble, making the car skip gears, hesitate, or even refuse to move. Addressing this issue usually involves checking the solenoid itself, ensuring it and its connections are in good shape, and confirming that the transmission fluid is clean and at the right level to keep the performance smooth.
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How to fix P0760 – learn from mechanics
I looked into P0760 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Chrysler
Vehicle Information 2007 Chrysler Sebring 2.4L
Issue + Repair History
- Installed a new Dealer PCM due to a P0760 transmission code.
- Attempted to program the PCM using an OTC 3829 VCI and TechAuthority subscription.
- During the programming process, received codes P0760 (Transmission shift solenoid #3) and U0101 (Loss of Communication with TCM).
- Device used for programming was not a Chrysler-approved device.
- No special adapters were used during the flashing process.
Other OBD2 Codes + Test Results
Mechanic Suggestions
- Recommended posting the issue in a technical discussion group for more specialized advice.
- Advised verifying the flash number on the original PCM and choosing updates based on that rather than the new PCM’s part number.
- Noted the absence of a separate TCM in the vehicle, indicating potential issues with flashing a TCM that does not exist.
- Suggested checking for any required adapter cables when reflashing certain Chrysler models, particularly Liberty, Sebring, Avenger, and Stratus models.
- Emphasized the importance of proper diagnosis before PCM replacement to avoid unnecessary reprogramming and expenses.
Final Fix
- Installed another PCM and flashed it successfully without any special adapters.
- The issue was resolved, and the P0760 DTC that prompted the PCM replacement was fixed.
Case #2: Dodge
Vehicle Information 2009 Dodge Journey SXT 3.5L
Issue + Repair History
- Transmission goes into limp mode when hot, with a P0760 code indicating an O/D shift solenoid issue.
- Engine light does not illuminate, and no codes are present when the vehicle is in limp mode.
- Replaced the PCM due to difficulty programming it, but encountered issues with the dealer’s computer during programming.
- Replaced PCM and solenoid assembly due to solenoid shorting the PCM.
Other OBD2 Codes + Test Results
- P0760: O/D Shift Solenoid
Mechanic Suggestions
- Advised checking the resistance and current of the O/D solenoid when applied, comparing it to a known working solenoid.
- Suggested inspecting for broken wires at the transmission connector, as similar issues have been encountered in the past.
- Mentioned the possibility of connector issues contributing to the problem.
Final Fix
- Replaced the PCM and solenoid assembly, resolving the transmission shifting issue.
- No codes returned after two weeks of driving, indicating successful repair.
Case #3: Ford
Vehicle Information 2000 Ford Escort ZX2 2.0L
Issue + Repair History
- Transmission skips 2nd gear and does not engage overdrive.
- P0760 code indicates a fault with solenoid C (solenoid 3).
- Solenoid C resistance measures 4 ohms, while other solenoids measure 12-15 ohms.
- Transmission fluid appears clean, and all bands and clutches engage when air checked.
- New solenoid needed, but unable to purchase separately; must buy entire valve body assembly.
Other OBD2 Codes + Test Results
- P0734: Gear 4 Incorrect Ratio
- P0760: Shift Solenoid C Fault
Mechanic Suggestions
- Recommends replacing the solenoid, as it often resolves similar issues successfully.
- Suggests swapping solenoids to troubleshoot and potentially identify a faulty component.
- Indicates that solenoids are typically sold with the complete valve body assembly, making replacement costly.
- Advises checking the 2/4 servo and verifying the band is not broken before replacing the solenoid/main control.
- Proposes checking for a broken 2/4 band or a problem with the 2/4 servo piston, as these issues can cause similar symptoms without involving electrical components.
- Several technicians suggest checking for a broken 2/4 band, which could be causing the transmission issues.
Final Fix
- Replaced the solenoid and entire valve body assembly, resolving the transmission skipping and overdrive engagement issues.
How to diagnose P0760
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Explanation |
|---|---|
| Inspect the shift solenoid and connections | Look for physical damage, corrosion, or loose connections. |
| Check wiring and harness | Examine for damage, shorts, or open circuits. |
| Test solenoid resistance and operation | Use tools to verify the solenoid functions correctly. |
| Examine the transmission fluid | Ensure it’s clean and at the proper level. |
| Replace the solenoid if necessary | If diagnostics confirm a fault, replace the solenoid. |
| Examine the TCM/ECM | Check for any issues, especially after reprogramming attempts. |
Addressing a P0760 code involves careful inspection and potential replacement of the shift solenoid, along with checks of the electrical system and transmission fluid. Given the critical role of this solenoid in vehicle operation, resolving the issue promptly is crucial for maintaining transmission health and ensuring reliable vehicle performance.
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko