P0764: Shift Solenoid C Intermittent

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P0764: Shift Solenoid C Intermittent

DIY Difficulty Level
Repair Cost
Can I Still Drive?
Yes (Short-term only)

What Does The P0764 Code Mean?

Most automatic transmissions incorporate at least three solenoids that are solenoid A, B and C. The trouble codes related to this, the “C” solenoid, are codes P0760, P0761, P0762, P0763 and P0764 based on the specific malfunction that alerts the PCM to set the code and illuminate the Check Engine Light. These codes will also be associated to the A, B or C solenoid circuit. If you have an Overdrive or other transmission warning lamp, it may be illuminated also.

The purpose of the Shift Solenoid Circuit is for the PCM to monitor the shift solenoids to manage the movement of fluid between various hydraulic circuits and change the transmission gear ratio at the appropriate time. This process maximizes the performance level of the engine at the lowest RPM possible.

The automatic transmission relies on bands and clutches to change gears and this is accomplished by having fluid pressure in the right place at the right time. The transmission solenoids are responsible for opening or closing valves in the valve body to allow transmission fluid to flow to the clutches and bands to shift the transmission smoothly as the engine accelerates.

When the Powertrain Control Module (PCM) detects a malfunction within the Shift Solenoid “C” Shift Circuit a variety of codes can be triggered depending on the specific vehicle, transmission and the number of gears incorporated into the specific automatic transmission. In this case, the P0764 OBD-II trouble code is associated with an intermittent fault in the the transmission Shift Solenoid “C” Circuit.

What Are The Symptoms Of The P0764 Code?

Symptoms of a P0764 trouble code may include:

  • Transmission slipping
  • Transmission overheating
  • Transmission catches in gear
  • Decreased fuel economy
  • Possibly misfire-like symptoms
  • Vehicle enters limp mode
  • Check Engine Light illuminated

What Are The Potential Causes Of The P0764 Code?

Causes for this P0764 transmission code may include:

  • Insufficient fluid level
  • Dirty or contaminated fluid
  • Dirty or clogged transmission filter
  • Defective transmission valve body
  • Restricted hydraulic passages
  • Transmission has internal failure
  • Faulty shift solenoid
  • Corroded or damaged connector
  • Faulty or damaged wiring
  • Faulty PCM

How Serious Is This P0764 Code?

The severity of this code normally starts as moderate, but it can progress to a more severe level rapidly when not corrected in a timely manner.

How Can You Fix The P0764 Code?

Prior to beginning the troubleshooting process for any malfunction you should research the Technical Service Bulletins (TSB’s) for the specific vehicle by year, model and transmission. In some circumstances this can save a lot of time in the long run by pointing you in the right direction. You should also check the vehicle records to verify the last time that the filter and fluid was changed if possible.

Fluid & Wiring Inspections

The first step is to make sure the fluid level is correct and inspect the condition of the fluid for contamination. Then, a thorough visual inspection to check the associated wiring for obvious defects such as scraping, rubbing, bare wires, or burn spots should be performed.

Next is to check the connectors and connections for security, corrosion and damaged pins. This process must include all wiring and connectors to the transmission solenoids, transmission pump and the PCM. Based on the configuration, the transmission linkage should be inspected for security and binding issues.

Advanced Steps

The advanced steps become very vehicle specific and require the appropriate advanced equipment to perform accurately. These procedures require a digital multi meter and the specific technical references for the vehicle. Voltage requirements will very based of the specific year and model of the vehicle. You should follow the specific troubleshooting chart for your vehicle.

Continuity Checks

Continuity checks should always be performed with the power removed from the circuit and the normal readings for wiring and connections should be 0 ohms of resistance unless otherwise specified by the technical data. Resistance or no continuity is an indication of faulty wiring that is open or shorted and must be repaired or replaced.

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Transmission Fluid (generic)
>>> Transmission Filter
>>> Transmission Valve Body
>>> 4L60E Transmission Shift Solenoid Valve Set
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> ECU
>>> KAIWEETS Digital Multimeter

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

P0764 Shift Solenoid C Intermittent, OBD-Codes.

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