P2714

Code

AUDI P — Powertrain

Transmission Control Module (TCM) failure, Transmission fluid level is low, Transmission shift solenoid failure, Wiring issue

Brand: AUDI

Type: P — Powertrain

Views: UK: 32 EN: 92 RU: 44

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Page language: EN

Causes

Faulty Transmission Control Module (TCM)
Low or contaminated transmission fluid
Failed shift or pressure control solenoid
Open/shorted wiring or poor connector contacts
Corroded grounds or low battery voltage
Intermittent CAN bus or module communication errors

Symptoms

Transmission enters limp/home mode or reduced shift availability
Harsh, delayed, or no shifting
Transmission slip or inability to engage gears
Malfunction Indicator Lamp (MIL) / transmission warning lamp illuminated
Stored or pending transmission-related codes

What to check

Read and record all stored/pending transmission codes and freeze frame data with a capable scan tool
Check battery voltage and charging system
Visually inspect transmission fluid level, color, and smell
Inspect wiring harness, connectors, and grounds at TCM and transmission
Confirm CAN bus/module communication is healthy

Signal parameters

Battery voltage at TCM: ~12–14.5 V during cranking/idle
TCM ground continuity: near 0 Ω
Solenoid coil resistance: typically single-digit to tens of ohms (refer to factory spec)
Solenoid command duty cycle: 0–100% (PWM) as commanded by TCM
Transmission line pressure: varies by gear and command, check factory spec (psi/bar)
Transmission fluid temperature and speed sensors (input/output) readings

Diagnostic algorithm

Use a scan tool to capture freeze frame, all transmission codes, current PID data (solenoid duty, line pressure, gear, speeds) and attempt to reproduce symptom.
Visually inspect TCM and transmission connectors for corrosion, bent pins, or water intrusion. Repair as needed.
Check battery and charging system; verify solid TCM power and ground circuits with meter. Repair poor connections.
Verify CAN bus/module communication — check for bus errors and confirm other modules communicate normally.
Check transmission fluid level and condition per manufacturer procedure (warm, on-level). If low, correct level and retest; if burnt/dark, plan fluid/ filter service.
Measure resistance of suspect shift/pressure solenoids at the transmission connector and compare to factory specs. Wiggle-test harness while monitoring for intermittent changes.
Perform active tests with scan tool: command solenoids and observe duty cycle, current draw, and change in line pressure/gears. If solenoid fails to respond electrically but has correct command, suspect open/short or solenoid failure.
If electrical checks pass but hydraulic response is wrong, perform a static/dynamic transmission line pressure test per factory procedure to verify hydraulic circuit.
If wiring and solenoids are good and line pressure is abnormal, suspect internal transmission hydraulic/mechanical issue or TCM programming/hardware fault.
Before replacing TCM, check for available software updates and current TCM calibration. Replace TCM only after excluding wiring, power/ground, solenoid and hydraulic faults.
Clear codes and road-test to confirm repair. Monitor for reappearance of P2714 and related codes.

Likely causes

Damaged solenoid harness or pinched wire
Loose or corroded TCM power/ground or connector
Low fluid level from leak or recent service error
Contaminated fluid causing solenoid sticking
Faulty TCM software or internal TCM fault

Fault status

⚠️ Status

Transmission control system fault detected (P2714). Possible causes: TCM error, low/contaminated fluid, shift/pressure solenoid failure, or wiring/connector/CAN communication issue. Perform electrical, fluid level, solenoid and hydraulic checks before replacing components.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-3.0 hours

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