P0785 OBD-II Trouble Code: Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0785 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0785 code

P0785 is a diagnostic trouble code (DTC) for "Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0785 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P0785 code definition

The appearance of the P0785 code means that the PCM detected an abnormal malfunction in the shift/time solenoid.

What the P0785 code means

The transmission control module, or TCM, uses data from the shift/timing solenoids to manage hydraulic fluid transfers between circuits, and to perform changes in transmission gear ratios in order to accelerate, decelerate, optimize fuel efficiency, and maximize engine performance. If the data from the shift/timing solenoid does not match the manufacturer’s specifications for the particular situation or command, the TCM will assume that there is a malfunction, and alert the PCM to store the P0785 code.

What causes the P0785 code?

The most likely causes of the P0785 code include:

  • Faulty shift solenoid
  • Blocked internal transmission fluid passages
  • Mechanical failures in the transmission
  • Low transmission fluid
  • Dirty transmission fluid
  • Faulty TCM or PCM
  • Open or shorted solenoid valve harness
  • Poor electrical connection in the shift/timing solenoid valve circuit

What are the symptoms of the P0785 code?

The symptoms of the P0785 code can vary significantly. In some cases, the only symptom will be the illumination of the Check Engine Light. In other cases, the transmission may fail to shift into or out of certain gears, [shifting may be harsh], the transmission may slip or overheat, and the vehicle’s fuel efficiency may suffer. It is also likely that the PCM will store other shift solenoid codes along with the P0785 code.

How does a mechanic diagnose the P0785 code?

In repairs where the transmission fluid could be causing an inaccurate data reading, the first step a mechanic should take is to inspect the transmission fluid. Low transmission fluid should be remedied. Dirty transmission fluid should be drained and replaced. The code should then be cleared from the PCM, and the system should be retested. If the code returns, the mechanic has successfully diagnosed a problem within the shift/timing solenoid or related components.

Common mistakes when diagnosing the P0785 code

In many cases, shift solenoids are replaced when the malfunction actually lied in the shift solenoid circuitry. It is important to test all electrical components before replacing any parts in order to ensure that this code will not return shortly after repairs.

How serious is the P0785 code?

If the P0785 code is detected by an OBD-II scanner, the issue needs to be addressed right away. While in some cases, there may be no noticeable symptoms, the transmission may still experience malfunctions. If this issue is left unaddressed, the vehicle could become inoperable.

What repairs can fix the P0785 code?

There are many ways that a technician can address a P0785 code. These methods may include:

  • Replacing a faulty shift solenoid, or shift solenoid pack.
  • Clearing blocked internal transmission fluid passages.
  • Addressing any mechanical failures in the transmission.
  • Remedying low transmission fluid.
  • Flushing and replacing dirty transmission fluid. In some cases, the entire transmission may need to be disassembled and cleaned in order to rid the system of dirty transmission fluid.
  • Replacing a faulty TCM or PCM.
  • Replacing or repairing an open or shorted solenoid valve harness.
  • Repairing a poor electrical connection in the shift/timing solenoid valve circuit.
  • Replace a defective pump in the transmission.

After each repair is performed, it is important to clear the code from the PCM and retest the system. If the code does not return, it may mean that the mechanic has performed the right repair to fix the issue. If it does return, it indicates that the problem is ongoing. This procedure helps narrow down the true cause behind the P0785 code.

Need help with a P0785 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P0785
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0785 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Chris

8 years of experience
223 reviews
Chris
8 years of experience
Chris is very friendly and knowledgeable. He explained everything in detail, and got the job done right.
2000 GMC YUKON - CHECK ENGINE LIGHT IS ON - PHOENIX, ARIZONA

Chris

19 years of experience
1240 reviews
Chris
19 years of experience
great !
1996 ISUZU RODEO - CHECK ENGINE LIGHT IS ON - HUNTINGTON BEACH, CALIFORNIA

Clarissa

24 years of experience
108 reviews
Clarissa
24 years of experience
She Was Absolutely The Best! Showed Up 20 Minuets Before Scheduled Time, Very Friendly, Super Professional & Explained Everything She Was Working On. Also Explaind Everything In A Way I would Understand.
2012 BUICK VERANO - CHECK ENGINE LIGHT IS ON - PHILADELPHIA, PENNSYLVANIA

Michael

13 years of experience
379 reviews
Michael
13 years of experience
I had a couple issues with my car, and Michael took his time to explain everything to me and what it is that he had to do. He's very friendly and gets the job done. I'm glad I found him!
2008 NISSAN XTERRA - CHECK ENGINE LIGHT IS ON - ALPHARETTA, GEORGIA

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...

Related questions

Q: Transmission not shifting sometimes.

If your transmission is not shifting properly it is likely due to internal damage inside the transmission or a little fluid level. I would recommend having a certified Transmission expert inspect your transmission to determine why it will not shift....

Q: Code p0101

The P0101 trouble code may keep returning if the engine computer does not see the MAF sensor input within a specified range when it is testing the MAF input. The input can be wrong if the engine has another problem...

Q: Just got code P0430. How long till catalytic converter fails completely?

Hi, thanks for writing in. This P0430 code is for the bank B or driver side converter or the O2 sensor after the converter. The code will need to be diagnosed to isolate the problem to the sensor or the...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com