What does shift solenoid A control circuit high mean?
Shift solenoids are used by the ECU to force pressurized hydraulic fluid (a.k.a. the transmission fluid) to move different parts like clutches and gears. If there is an unusually high-voltage signal coming from the shift solenoid A control circuit, a P0974 DTC will be saved.
What does P0974 mean?
shift solenoid A control circuit
P0974 code definition The P0974 code is generic powertrain code related to the transmission, including pressure faults and sensor failures. In this case, the engine control module (ECM) has detected a fault with a high voltage reading from the shift solenoid A control circuit.
When to use the Shift Solenoid code p0974?
A code P0974 will be stored when the shift solenoid A, or No. 1, is “OFF” and a status continues for 0.5 seconds with the automatic transmission ECM terminal monitor signal is on for one drive cycle. What causes the P0974 code? Several problems may cause a P0974 code including: What are the symptoms of the P0974 code?
Why is DTC p0974 high in ECM memory?
If one of these checks fails, such as encountering an open circuit on Shift Solenoid A (SSF), the TCM disables that control circuit and sets DTC P0974 – Shift Solenoid A Control Circuit High in ECM memory. What are the common causes of code P0974 ? Depending on year, make, and model, DTC P0974 may have a couple of causes.
What is the diagnostic code for Shift Solenoid?
P0974 is a diagnostic trouble code (DTC) for “Shift Solenoid A Control Circuit High”. 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 $0.0.
How does the TCM check a shift solenoid?
During operation, the TCM checks the operation of the solenoid valves, consisting of a resistance check and speed sensor verification. If one of these checks fails, such as encountering an open circuit on Shift Solenoid A (SSF), the TCM disables that control circuit and sets DTC P0974 – Shift Solenoid A Control Circuit High in ECM memory.