P0785 Code - Shift/Timing Solenoid Malfunction
Quick Answer
The 3-2 Shift Solenoid (SS) valve assembly is a normally-closed, 3-port, on/off device that controls the 3-2 downshift. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shifting 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
- P0785 indicates Shift/Timing Solenoid Malfunction.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shifting 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.
Code P0785 Description
When the PCM detects a continuous open, short to ground or short to power in the 3-2 SS valve assembly circuit, then DTC P0785 sets.
What are the Possible Causes of the DTC P0785?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shifting solenoid valve
- Shifting solenoid valve harness is open or shorted
- Shifting solenoid valve circuit poor electrical connection
How to Fix the DTC P0785?
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 P0785 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.
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Information for Specific Makes
- P0785 Audi — Shift/Timing Solenoid Malfunction
- P0785 Buick — 3-2 Shift Solenoid Circuit Electrical
- P0785 Cadillac — 3-2 Shift Solenoid Circuit Electrical
- P0785 Chevrolet — 3-2 Shift Solenoid Circuit Electrical
- P0785 GMC — 3-2 Shift Solenoid Circuit Electrical
- P0785 Isuzu — 3-2 Shift Solenoid Circuit Electrical
- P0785 Mercedes-Benz — Shift/Timing Solenoid Malfunction
- P0785 Pontiac — 3-2 Shift Solenoid Circuit Electrical
- P0785 Saturn — 3-2 Shift Solenoid Circuit Electrical
- P0785 Subaru — Shift/Timing Solenoid Malfunction
- P0785 Volkswagen — Shift/Timing Solenoid Malfunction
Frequently Asked Questions about P0785 Code
1. What are the common symptoms of OBDII code P0785 (Shift/Timing Solenoid Malfunction)?
- Common symptoms include harsh shifting, delayed shifting, transmission slipping, and a decrease in fuel efficiency.
2. What are the possible causes of OBDII code P0785?
- The code P0785 can be caused by a faulty shift/timing solenoid, low transmission fluid, a damaged wiring harness, or a malfunctioning transmission control module.
3. How serious is OBDII code P0785?
- OBDII code P0785 should be addressed promptly to prevent further damage to the transmission and ensure the vehicle operates safely and efficiently.
4. How can I diagnose OBDII code P0785?
- Diagnosing code P0785 typically involves using a scan tool to retrieve the code, inspecting the transmission fluid level and condition, and conducting a thorough visual inspection of the solenoid and related components.
5. Can I drive with OBDII code P0785?
- It is not recommended to drive with OBDII code P0785, as it can lead to transmission issues and potential safety hazards.
6. How can I repair OBDII code P0785?
- Repairing code P0785 may involve replacing the shift/timing solenoid, repairing or replacing damaged wiring, ensuring proper transmission fluid levels, and resetting the fault code.
7. Are there any DIY tips for fixing OBDII code P0785?
- While some DIY enthusiasts may attempt to replace the shift/timing solenoid themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair.
8. How much does it cost to fix OBDII code P0785?
- The cost of fixing OBDII code P0785 can vary depending on the root cause of the issue, the necessary repairs, and the labor rates of the repair shop. It is advisable to obtain multiple quotes from reputable mechanics.
9. Can OBDII code P0785 cause further damage if left untreated?
- Yes, leaving OBDII code P0785 untreated can lead to more severe transmission problems, potentially resulting in costly repairs or even transmission failure.
10. How can I prevent OBDII code P0785 from occurring in the future?
- To prevent OBDII code P0785, it is essential to maintain regular transmission fluid checks and changes, address any transmission issues promptly, and ensure the vehicle undergoes regular maintenance checks.
Discuss the causes and fixes for P0785 OBDII Code
-
FYI the error code stops acting up, after the engine reaches operating temperature, and will stay that way for the rest of the day, unless it cools down all the way to room temp.
I use a code reader to reset the code to prevent hard shift, thus trany damage .
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