P0753 Shift Solenoid A Electrical
OBD-II Trouble Code Technical Description
Former Service Manager & Air Force Mechanic
Shift Solenoid A Electrical
What does that mean?
This is a generic transmission diagnostic trouble code (DTC) and typically applies to OBD-II vehicles equipped with an automatic transmission.
That may include but is not limited to vehicles from Chrysler, Ford, Dodge, Hyundai, Kia, Ram, Lexus, Toyota, Mazda, Honda, VW, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.
Most automatic transmissions incorporate at least three solenoids that are solenoid A, B and C. The trouble codes related to this, the "A" solenoid, are codes P0750, P0751, P0752, P0753 and P0754 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 "A" 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 P0753 OBD-II trouble code is associated with a an electrical malfunction with the the transmission Shift Solenoid "A" Circuit.
Example of shift solenoids:
What is the severity of this DTC?
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.
What are some of the symptoms of the code?
Symptoms of a P0753 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 some of the common causes of the code?
Causes for this P0753 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
What are some P0753 troubleshooting steps?
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.
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 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.
What are some common repairs for this code?
- Changing the fluid and filter
- Repair or replace a faulty shift solenoid
- Repair or replace defective transmission valve body
- Repair or replace defective transmission
- Transmission flush to clean passages
- Cleaning corrosion from connectors
- Repairing or replacing wiring
- Flashing or replacing PCM
Hopefully, the information in this article has been helpful to point you in the right direction to correct the problem with your Shift Solenoid Circuit fault code. This article is strictly informational and the specific technical data and service bulletins for your vehicle should always take priority.
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