![]() This increase in hydraulic fluid pressure activates the shift solenoids, which in turn engage the appropriate clutches and bands. ![]() As the transmission is put into gear, hydraulic fluid pressure builds up behind a series of check valves. When the transmission is in “park” or “neutral,” the hydraulic fluid pressure is at its lowest. As a vital component of an automatic transmission, the shift solenoid helps control the flow of transmission fluid and regulates the pressure in the transmission. To be more precise, a shift solenoid is a type of electrical switch used to control the shifting of gears in a vehicle. It is responsible for engaging and disengaging the transmission’s gears. It’s usually located in the transmission and is operated by hydraulic pressure. What Is a Shift Solenoid?Ī shift solenoid is a device that controls the flow of transmission fluid in your car. The main cause of the problem is not changing the transmission fluid, and the repair will set you back between $300 and $500. The most common symptoms of a bad shift solenoid are problems with shifting gears, such as delayed shifts, transmission slipping, or having your vehicle stuck in a single gear. In this article, we’ll show you how to identify a bad shift solenoid and how to go about replacing it. A bad shift solenoid can cause all sorts of problems, from a loss of power and hesitation when accelerating to complete transmission failure. ![]() This article is for informational purposes only and specific technical data and service bulletins for your vehicle should always take priority.When your car’s transmission starts to slip, stall or produce weird sounds, it may be time to replace the shift solenoid. Hopefully the information in this article has helped point you in the right direction to troubleshoot the shift solenoid circuit DTC problem. Flushing transmission for clean passages.Repair or replace a faulty transmission.Repair or replace a faulty transmission valve body.Repair or replace the defective shift solenoid.What are the standard ways to fix this code? Resistance or no continuity indicates faulty wiring that is open or shorted and requires repair or replacement. Continuity checksĬontinuity checks should always be performed with circuit power disconnected and normal wiring and connection readings should be 0 ohms of resistance unless otherwise specified in the datasheet. You must follow the specific troubleshooting chart for your vehicle. Voltage requirements will depend on the specific year and vehicle model. These procedures require a digital multimeter and vehicle-specific technical reference documents. The additional steps become very vehicle specific and require appropriate advanced equipment to be performed accurately. Depending on your configuration, you need to check the transmission link for security and binding issues. This process should include all wiring and connectors to the transmission solenoids, transmission pump, and PCM. ![]() Next, you should check the connectors and connections for safety, corrosion and damage to the contacts. A thorough visual inspection should then be carried out to check the associated wiring for obvious defects such as scratches, abrasions, exposed wires, or burn marks. The first step is to make sure the fluid level is correct and check the condition of the fluid for contamination. You should also check the vehicle records to check when the filter and fluid were last changed, if possible. In some cases, this can save you a lot of time in the long run by pointing you in the right direction. What are some steps to troubleshoot the P2709?īefore beginning the troubleshooting process for any problem, you should review the vehicle-specific Technical Service Bulletins (TSB) by year, model and transmission. ![]()
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