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Home / DTC / P2734 — Pressure Control Solenoid F Electrical

P2734 — Pressure Control Solenoid F Electrical

Detailed page for trouble code P2734.

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Code

P2734

Generic P — Powertrain

Pressure Control Solenoid F Electrical

Brand: Generic
Type: P — Powertrain
Views: UK: 10 EN: 21 RU: 15
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Page language: EN

Causes

  • Damaged, corroded or disconnected connector at solenoid
  • Broken, chafed or shorted wiring harness between TCM/PCM and solenoid
  • Internal solenoid coil failure (open or short)
  • Poor or missing ground or power supply issues (low battery/charging)
  • Contaminated transmission fluid or internal valve body contamination preventing proper solenoid operation
  • Faulty transmission control module (TCM/PCM) or poor connector at module

Symptoms

  • Transmission MIL (check engine light) illuminated
  • Erratic shifting, harsh shifts, delayed shifts or stuck in limp/limited gear
  • Erratic line pressure or loss of proper line pressure control
  • Transmission may default to a single gear or reduced performance mode
  • Stored multiple transmission-related fault codes

What to check

  • Read and record all stored codes and freeze-frame data with a scan tool; check for related transmission codes
  • Visually inspect wiring and connector at solenoid for corrosion, damage, pin push-out or fluid intrusion
  • Check transmission fluid level and condition (burnt smell, debris)
  • With ignition ON (engine OFF) and then engine running, monitor live data for solenoid command and measured response if available
  • Perform an actuator/bi-directional test (command solenoid on/off) using a diagnostic scanner and observe behavior
  • Measure DC resistance of the solenoid coil with connector disconnected; compare to service specifications

Signal parameters

  • Typical steady DC resistance: varies by vehicle (commonly in the range of ~5–50 Ω) — consult vehicle service manual for exact spec
  • Control signal: PWM from transmission control module; voltage pulses ranging roughly 0–12 V, duty cycle varies to control pressure
  • Typical PWM frequency: commonly tens to a few hundred Hz (example 50–500 Hz) depending on manufacturer
  • Inactive (uncommanded) voltage: near 0 V (or battery voltage on some circuits depending on driver type); commanded duty cycles increase effective voltage
  • Expect changes in duty cycle/voltage when commanding solenoid during actuator test (refer to service data for exact expected values)

Diagnostic algorithm

  1. Verify DTC P2734 is present; record freeze frame and any related codes. Clear code and attempt to reproduce.
  2. Perform a visual inspection of the transmission wiring harness, solenoid connector and nearby components for damage, fluid intrusion, or corrosion.
  3. Check transmission fluid level and condition; repair leaks and replace contaminated fluid if present.
  4. With connector disconnected, measure solenoid coil resistance and compare to the vehicle specification. Replace solenoid if out of range or open/shorted.
  5. Inspect connector pins for corrosion, bent or pushed-out pins; clean and repair as needed. Verify good terminal engagement.
  6. With connector connected, backprobe the control and reference/ground wires. Use a multimeter or scope to check for proper voltage and PWM while commanding the solenoid ON/OFF via scan tool. Look for short to ground or short to battery.
  7. If voltage is present and correct but solenoid does not respond or resistance was OK, replace the solenoid (and filter/service fluid if contaminated) and retest.
  8. If wiring and solenoid test OK but fault persists, trace continuity back to TCM/PCM connector; repair damaged wiring. Check module grounds and power supplies.
  9. If wiring and grounds are verified and no short/open exists, consider TCM/PCM fault — consult service manual for module testing or substitution procedures.
  10. After repairs, clear codes and perform a road test with live-data monitoring to confirm correct operation and that the code does not return.

Likely causes

  • Wiring harness damage or connector corrosion at solenoid (most common)
  • Open or shorted solenoid coil
  • Contaminated fluid or valve body issue affecting solenoid operation
  • Faulty TCM or module connector (less common)

Fault status

⚠️ Status
P2734 — Pressure Control Solenoid F Electrical: circuit indicates open/short/intermittent or solenoid failure. Check wiring, connector, solenoid and module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0750 P0751 P0753 P0740 P2770 P2763
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