What is P0717 Fault-Error Code?
The P0717 fault-error code indicates a problem with the Turbine Speed Sensor (TSS) circuit in the vehicle's transmission system. Specifically, it means that the Transmission Control Module (TCM) or Engine Control Module (ECM) is not receiving signals from the Turbine Speed Sensor.
The Turbine Speed Sensor measures the rotational speed of the input shaft or turbine within the transmission. This information is crucial for the TCM to determine various parameters such as gear selection, torque converter lock-up, and shift timing.
When code P0717 appears, it usually means that the TCM or ECM has detected an open circuit or lack of signal from the Turbine Speed Sensor. This can be caused by a variety of issues, including a faulty sensor, wiring issues, or problems with the TCM or ECM itself.
What are the symptoms of P0717 Fault/Error Code?
Some potential symptoms of trouble/error code P0717 include:
Engine Malfunction Light Turning On: The most common symptom of the P0717 fault code is the check engine light on the vehicle's instrument panel turning on. Illuminates when the engine control module (ECM) or transmission control module (TCM) detects a fault with the turbine speed sensor circuit.
Transmission Shift Problems: Problems in the TSS circuit can affect the transmission's ability to shift smoothly or accurately. You may experience erratic or harsh shifting, delayed shifting, or the inability to shift into certain gears.
Transmission Skip: A faulty TSS circuit can cause transmission slippage when the transmission is unable to properly maintain power and acceleration, especially under load or during acceleration.
Engine Protection Mode: In some cases, the TCM may place the transmission into fail-safe or protection mode to protect it from further damage. This mode typically limits the transmission to a single gear, such as second or third, and limits vehicle speed to prevent further problems.
Reduced Fuel Efficiency: Problems with the TSS circuit can affect transmission efficiency and result in reduced fuel efficiency over time due to inadequate transmission performance.
Other Transmission-Related Problems: Depending on the severity of the problem and the vehicle's specific transmission system, other transmission-related symptoms may occur, such as abnormal noises, rough shifting, or transmission hesitation.
What could be the causes of P0717 Fault/Error Code?
Various possible causes can trigger the P0717 malfunction/error code, including:
Defective Turbine Speed Sensor (TSS): A faulty or malfunctioning Turbine Speed Sensor is one of the most common causes of code P0717. The sensor may be faulty due to internal electronic problems, mechanical damage, wear and tear, or corrosion.
Wiring Problems: Problems in the wiring harness connecting the Turbine Speed Sensor to the Transmission Control Module (TCM) or Engine Control Module (ECM) can cause code P0717. This may include damaged cables, broken connections, loose terminals, or corroded connectors.
Defective Connectors or Terminals: Corrosion, contamination, or damage to the connectors or terminals associated with the TSS circuit can prevent proper signal transmission and lead to code P0717.
Faulty TCM or ECM: In rare cases, a malfunction in the TCM or ECM itself can cause code P0717. This may be due to internal electronic problems or communication problems within the module.
Mechanical Problems: Mechanical problems within the transmission itself, such as a damaged or worn input shaft, turbine, or related components, can indirectly affect the operation of the Turbine Speed Sensor and cause code P0717.
Other Electrical Problems: Other electrical problems in the vehicle's wiring system, such as shorts, open circuits, or voltage irregularities, can disrupt signal transmission from the TSS and trigger code P0717.
What Steps Should Be Followed to Resolve the P0717 Fault/Error Code?
Steps to follow to resolve the P0717 malfunction/error code:
Read the Code: Use an OBD-II scanner to retrieve trouble code P0717 and other related codes stored in the vehicle's Engine Control Module (ECM) or Transmission Control Module (TCM). Make a note of any existing codes as they may provide additional information about the problem.
Inspect the Turbine Speed Sensor (TSS): Locate the Turbine Speed Sensor on the transmission and check for any signs of damage or wear. Check the sensor for loose connections, corrosion, or physical damage.
Check Cables and Connectors: Check the wiring harness connecting the TSS to the TCM or ECM for any damage, breaks, or loose connections. Check connectors and terminals for corrosion or contamination.
Test Turbine Speed Sensor Voltage: Use a multimeter to test the voltage output of the TSS with the engine running and the transmission in gear. Compare the measured voltage readings with the specifications stated in the vehicle's service manual.
Inspect Transmission Control Module (TCM): If necessary, check the transmission control module (TCM) for any internal faults or communication problems with the TSS circuit. Make sure the TCM receives and transmits signals correctly.
Repair or Replace Faulty Components: Depending on your diagnosis, repair or replace faulty components identified during the inspection, such as the Turbine Speed Sensor, wiring harness, connectors, or TCM.
Clear Codes and Test Drive: After completing repairs, clear fault codes stored in the ECM or TCM using the OBD-II scanner. Take the vehicle for a test drive to make sure code P0717 does not return and the transmission is working properly.
Recurrence Monitoring: Pay attention to the vehicle's performance and check if the P0717 fault code recurs. If the code returns, recheck all components and cables to identify any overlooked problems.
What are the Long-Term Effects of the P0717 Fault/Error Code?
The long-term effects of fault/error code P0717 are:
Transmission Damage: The Turbine Speed Sensor (TSS) plays a critical role in the proper operation of the transmission by providing data about rotational speed. If the TSS circuit problem is not addressed promptly, it can lead to improper transmission operation, including delayed or rough shifting, which can accelerate wear and tear on transmission components over time. Prolonged operation with incorrect speed readings may cause transmission damage.
Transmission Overheating: A faulty TSS circuit can cause improper transmission operation, including failure to properly engage certain gears or failure to maintain proper torque converter lock-up. This causes excessive friction and heat buildup in the transmission, which can lead to overheating over time. Prolonged transmission overheating can damage internal components and cause transmission failure.
Reduced Fuel Efficiency: Problems with the TSS circuit can affect transmission efficiency and result in reduced fuel efficiency over time due to inadequate transmission performance. Incorrect speed readings can result in incorrect shift timing, increased slip and higher fuel consumption.
Transmission Slip: Malfunctions in the TSS circuit can cause transmission slip when the transmission is unable to properly maintain power and acceleration, especially under load or during acceleration. Continued slippage can cause further damage to transmission components over time.
Safety Concerns: Transmission-related issues, such as delayed or rough shifting, can affect the drivability and safety of the vehicle. Erratic shifting behavior can compromise the vehicle's handling and response, potentially resulting in unsafe driving conditions and an increased risk of accidents.
Overall, it is very important to address a P0717 fault code immediately to prevent possible long-term effects on the vehicle's transmission, drivability, fuel efficiency and safety. Ignoring the problem or delaying repairs can lead to more significant problems and higher repair costs in the future. If you encounter a P0717 fault code, it is recommended that the vehicle be diagnosed and repaired by a qualified mechanic or automotive technician as soon as possible.
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