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Home / DTC / P0732 — Gear shift 2nd incomplete

P0732 — Gear shift 2nd incomplete

Detailed page for trouble code P0732.

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Code

P0732

MITSUBISHI P — Powertrain

Gear shift 2nd incomplete

Brand: MITSUBISHI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Low or contaminated automatic transmission fluid (ATF) level
  • Worn or damaged 2nd gear clutch pack or band
  • Faulty shift solenoid (electrical failure or sticking)
  • Valve body or shift valve sticking/contamination
  • Internal transmission wear (planetary gears, sun gear, ring gear)
  • Torque converter problem or excessive slip

Symptoms

  • Check Engine/Transmission warning lamp illuminated
  • Harsh, delayed, or soft shift into 2nd gear
  • Slip or lack of acceleration when transmission should be in 2nd gear
  • Unusual transmission noise during shift or while in 2nd gear
  • Reduced performance, limp-home mode or transmission stuck in one gear
  • Transmission fluid leak, burnt smell, or dark/contaminated fluid

What to check

  • Read freeze-frame data and live PIDs with a capable scan tool; record input (turbine) and output (vehicle) speed, gear commanded and gear actual
  • Check ATF level and condition (color, smell, particles) with correct warm-up procedure
  • Scan for related codes (shift solenoids, pressure sensor, speed sensors, torque converter clutch)
  • Visually inspect wiring/connectors to TCM and transmission (solenoid harness, grounds)
  • Activate shift solenoids with a bi-directional scan tool and monitor response
  • Measure shift solenoid coil resistance and compare to factory spec

Signal parameters

  • Compare engine RPM (crankshaft) vs turbine/input speed and output/vehicle speed to calculate gear ratio; in 2nd gear the actual ratio should match factory spec for that model/year
  • Shift solenoid coil resistance: consult service manual; typical range for many transmissions ~ 6–30 ohms (verify OEM spec)
  • Transmission line/shift pressure: measure against model-specific specification under idle and full throttle (use service manual values)
  • TCM/PCM commanded gear vs actual gear PID values from scan tool (should match when functioning)

Diagnostic algorithm

  1. Retrieve all stored codes and freeze-frame data; note conditions when P0732 set (speed, RPM, load).
  2. Check ATF level and condition; top or replace fluid/filter if low or contaminated. If fluid severely degraded or burnt, consider fluid and filter service and retest.
  3. Inspect wiring and connectors for the transmission, shift solenoid circuits, speed sensors and ground points; repair any damage or corrosion.
  4. Use a scan tool to command the shift solenoids while observing input/output speeds and gear PID. Verify solenoid activation changes hydraulic behavior.
  5. Measure shift solenoid coil resistance and compare to OEM values. Replace solenoid(s) if out of spec or intermittent.
  6. Install a transmission line pressure gauge and measure pressure in neutral, idle, and under load. Compare with factory specs; low pressure points to hydraulic leaks, worn pump, or valve body issues.
  7. If pressure and solenoids test OK, perform valve body inspection/service: remove valve body, inspect spool valves, springs, separator plate and replace worn components or gaskets. Clean any debris.
  8. If hydraulic and electrical systems check out, consider internal mechanical checks (clutch pack inspection, planetary gear inspection) which require partial or full transmission disassembly.
  9. Check speed sensor outputs and TCM software level; reprogram/reflash or perform TCM relearn procedures if recommended by manufacturer.
  10. After repairs, clear codes, perform road test with scan tool and verify gear ratios and that the code does not return.

Likely causes

  • Low ATF level or degraded fluid causing poor hydraulic pressure
  • Shift solenoid for 2nd gear circuit stuck open/short or intermittent
  • Valve body spool or separator plate contamination preventing proper line pressure routing
  • Worn 2nd-gear clutch plates or wave springs allowing slip under load
  • Faulty vehicle speed or turbine/input speed sensor data confusing gear detection

Fault status

⚠️ Status
TCM reports actual 2nd gear ratio out of expected range. Fault may be hydraulic, mechanical, electrical, sensor, or control related. Verification with fluid, pressure, solenoid and sensor checks required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 2-6 hours

Similar codes

P0730 P0731 P0733 P0734 P0740 P0750
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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