Drivers notice a transmission that no longer shifts smoothly. The first sign is a noticeable “hard‑shift” event—gear changes feel abrupt or delayed, especially when accelerating from a stop or during upshifts at higher speeds. Some owners report a brief loss of drive as the transmission briefly slips before re‑engaging. The transmission‑temperature warning lamp may flash or stay illuminated, indicating the control module is detecting abnormal hydraulic pressure. In many cases the check‑engine light will accompany the transmission‑temperature warning, prompting a scan that returns P2713.
These symptoms arise because the Pressure Control Solenoid D, which regulates hydraulic pressure for a specific clutch pack, is not receiving the correct command or is failing to open/close as instructed. When pressure cannot be built or released correctly, gear actuation becomes erratic, producing the harsh‑shift or slip sensations described above.
The Transmission Control Module (TCM) sends pulse‑width‑modulated (PWM) signals to each pressure control solenoid. Corrosion, broken pins, or a faulty CAN‑bus transceiver can corrupt the PWM signal to Solenoid D. When the TCM cannot confirm the solenoid’s response, it logs P2713.
Solenoid D controls pressure to a clutch that engages a particular gear. A clogged hydraulic circuit, air entrapped in the fluid, or degraded fluid viscosity can prevent the solenoid from achieving the target pressure, causing the TCM to register a pressure‑control error.
The harness that carries the PWM signal and feedback voltage to Solenoid D is exposed to heat, vibration, and moisture. Cracked insulation, corroded terminals, or loose pins create intermittent resistance, leading the TCM to interpret a loss of control and set P2713.
Even with clean wiring and proper fluid, the TCM’s driver circuitry for Solenoid D may be damaged by voltage spikes or thermal stress. A failing output transistor will produce incorrect duty cycles, and the module will store the fault code.
While the solenoid itself can seize or develop internal coil shorts, these conditions usually manifest as a secondary symptom. Because the solenoid is actuated by the TCM, a mechanical failure still appears as a communication or pressure error, prompting the same code.
Connect a professional scan tool, read all stored and pending codes, and note any accompanying transmission‑temperature or shift‑quality codes. Clear the codes and perform a test drive to confirm reproducibility.
Monitor the PWM duty cycle and voltage for Solenoid D while the vehicle shifts. Normal duty ranges are typically 0–100 % with a voltage of 12 V ± 0.5 V. Deviations, spikes, or flat‑line readings indicate a communication or power issue.
Using a multimeter, check continuity from the TCM output pin to the solenoid connector. Measure resistance across the coil; most solenoids read 2–5 Ω. Compare values to manufacturer specifications. Replace any damaged harness sections.
Verify transmission fluid level, condition, and temperature. Dark, burnt fluid or fluid below the “Full” mark can cause pressure anomalies. Perform a pressure test with a calibrated gauge to confirm the system meets the required pressure for the affected gear.
If wiring and fluid are sound, bench‑test the TCM (or use a scan‑tool‑directed output test) to confirm the PWM signal is generated correctly. An absence of signal despite a command indicates internal TCM failure.
– If the solenoid coil fails resistance test: replace the solenoid.
– If wiring is compromised: repair or replace the harness section.
– If the TCM output is absent or erratic: proceed to module replacement (see next section).
Cost estimates
If the TCM output stage for Solenoid D is damaged, repairs are often temporary because the internal driver circuitry is prone to repeat failure under normal operating stresses. A VIN‑matched TCM replacement eliminates the risk of recurring communication errors and ensures the new module is calibrated to the vehicle’s specific transmission hardware.
Modern control modules are complex and integrated with security and immobilizer systems. That’s why choosing a replacement isn’t only about the hardware—it’s about correct programming and compatibility. Flagship One specializes in VIN‑matched control modules, providing a plug‑and‑drive solution backed by warranty. Their units are pre‑programmed to the exact software version required for your vehicle, eliminating dealer‑only re‑flash delays and ensuring seamless integration with existing transmission components.
Service Recommendation: Most issues related to this fault are diagnosed and corrected through inspection, wiring repair, and calibration rather than module replacement. For modules not typically replaced through aftermarket suppliers, diagnosis and repair should be performed by a certified automotive technician with access to factory service information and tooling.