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Home / DTC / P1913 — Gear jump

P1913 — Gear jump

Detailed page for trouble code P1913.

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P1913

MITSUBISHI P — Powertrain

Gear jump

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

Causes

  • Low, contaminated, or overheated transmission fluid
  • Worn or damaged clutch packs or bands inside the transmission
  • Faulty or sticking shift solenoids
  • Damaged valve body or internal hydraulic passages
  • Faulty transmission control module (TCM) or engine control module (ECM) software/commands
  • Wiring or connector faults to TCM/solenoids/sensors

Symptoms

  • Unexpected or abrupt shift into a different gear (gear 'jumps')
  • Engine RPM surge or drop when gear changes
  • Jerking or lurching during acceleration or deceleration
  • Intermittent loss of drive or slipping under load
  • Check Engine or Transmission warning lamp illuminated
  • Transmission may enter limp-home mode or store additional transmission-related codes

What to check

  • Read and record all stored DTCs and freeze-frame data with a capable scan tool
  • Check transmission fluid level, color, and odor (burnt smell) — record fluid condition
  • Perform a road test while monitoring live transmission data (commanded gear, actual gear, input/output speed, line pressure if available)
  • Compare TCM commanded gear vs actual gear and watch for mismatch events
  • Inspect wiring harnesses and connectors to TCM, shift solenoids, and speed/range sensors for damage or corrosion
  • Check resistance and continuity of shift solenoids and compare to manufacturer specs

Signal parameters

  • TCM commanded gear / requested shift position
  • Actual gear / transmission output gear (gear ratio)
  • Transmission input speed (Turbine speed)
  • Transmission output speed (Vehicle speed)
  • Shift solenoid duty cycle/ON-OFF status
  • Measured line / hydraulic pressure (kPa or psi)

Diagnostic algorithm

  1. Connect a professional scan tool and record all DTCs and freeze frame data. Note any related codes (speed sensors, solenoids, pressure)
  2. Check transmission fluid level, condition, and temperature. If fluid is low or severely contaminated, drain and inspect magnet/strainer for metal debris
  3. Perform a controlled road test while logging live data: compare commanded gear vs actual gear, monitor input/output speeds and solenoid status
  4. Inspect wiring and connectors for the TCM, shift solenoids, range sensor, and speed sensors. Repair any damaged wiring or poor connections
  5. Measure shift solenoid resistance and operate solenoids with an active test. Replace any solenoid outside spec or that fails to actuate properly
  6. If solenoids test OK, perform hydraulic pressure tests per factory procedure to verify line pressure and apply pressures. Low or fluctuating pressure points to internal wear or valve body issues
  7. Remove and inspect valve body for stuck spools, debris, or wear if hydraulic tests indicate abnormal behavior; replace or rebuild valve body as required
  8. If hydraulic and solenoid systems test normal, verify TCM software version and perform any available TCM updates or relearn procedures; reset adaptive values and re-test
  9. If mechanical wear (clutch packs, bands, gears) is indicated by pressures, debris, or performance, plan for transmission overhaul or replacement and provide estimate
  10. After repairs, clear codes, perform required relearns/adaptations, and perform a thorough road test while monitoring parameters to confirm correct shifting

Likely causes

  • Contaminated or low transmission fluid causing reduced hydraulic pressure
  • One or more shift solenoids not responding or out of specification
  • Valve body spool valves sticking due to debris or wear
  • Electrical fault in solenoid circuit (open, short, corroded connector)
  • Incorrect or missing TCM shift command due to module fault or software issue
  • Worn clutch pack or band causing loss of engagement under load

Fault status

⚠️ Status
Gear jump detected — unexpected or incorrect gear change observed. Possible hydraulic, mechanical, or control-system fault affecting shift integrity.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 3-8 hours

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