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Home / DTC / P2119 — Throttle actuator throttle body

P2119 — Throttle actuator throttle body

Detailed page for trouble code P2119.

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Code

P2119

MITSUBISHI P — Powertrain

Throttle actuator throttle body

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

Causes

  • Faulty electronic throttle body / throttle actuator (motor or current sensor)
  • Open/short or high resistance in wiring harness to throttle body
  • Poor or corroded connector pins at throttle body or ECM
  • Low battery voltage or poor charging system affecting actuator operation
  • Internal contamination or mechanical binding of the throttle plate
  • Faulty ECM or intermittent ECM output/processing error

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power / limp-home mode
  • Hesitation or reduced throttle response, poor acceleration
  • Rough or unstable idle, stalling in some cases
  • Unexpected throttle behavior or surging during acceleration
  • Difficulty completing throttle relearn or initialization procedures

What to check

  • Read and record freeze frame and live data (throttle angle, commanded angle, motor current sensor if available, battery voltage)
  • Clear code and attempt to reproduce to confirm persistence
  • Visual inspection of throttle body connector, wiring harness, and ECM connector for damage/corrosion
  • Check battery and charging system voltage under load (should be ~12–14.5 V)
  • Wiggle test the wiring while watching live data for intermittent changes
  • Compare commanded throttle angle vs actual throttle plate feedback on a scan tool

Signal parameters

  • Battery/charging voltage under load: ~12–14.5 V expected
  • Throttle position feedback range: ~0–100% (0° to fully open) — actual should follow commanded angle closely
  • Motor current sensor output typically a low-voltage sensor signal within a 0–5 V range; look for stable, sensible voltage that varies when throttle motor is commanded
  • When commanding throttle change, motor current or sensor voltage should change smoothly and throttle feedback should move within a fraction of a second
  • No open-circuit or infinite resistance on motor or sensor lines; continuity and proper resistance expected (compare to service manual values)

Diagnostic algorithm

  1. Retrieve trouble code, freeze frame and relevant live data (commanded throttle, actual throttle, motor current sensor, battery voltage).
  2. Inspect throttle body connector and wiring for damage, corrosion, loose pins; repair as needed. Check grounds.
  3. Check battery and charging system; ensure stable voltage during cranking and under load. Recharge/replace battery if low.
  4. Perform wiggle test on harness with scan tool monitoring throttle feedback and motor current sensor for intermittent faults.
  5. Measure continuity and resistance of throttle actuator motor and current sensor circuits between throttle body connector and ECM; look for opens, shorts to ground or power, or high resistance.
  6. Backprobe throttle body connector and monitor sensor voltages while commanding throttle open/close with scan tool; verify motor/sensor changes smoothly and within expected ranges. Use oscilloscope if available to detect noise or intermittent spikes.
  7. Inspect throttle plate for carbon buildup or mechanical binding; clean if needed and retest. Verify free movement by hand (with ignition off and as allowed by service procedure).
  8. If wiring and mechanical checks pass, perform throttle initialisation/relearn procedure per manufacturer instructions and clear codes. Re-test for recurrence.
  9. If fault persists and tests point to assembly failure, replace electronic throttle body / actuator with OEM part and perform required initialization. Re-scan and road-test.
  10. If replacement does not clear issue, consider ECM diagnosis or replacement as last resort (after verifying wiring and replaced component).

Likely causes

  • Faulty throttle actuator motor current sensor or motor
  • Corroded or loose connector at throttle body
  • Short to power or ground on the throttle actuator sensor circuit
  • Low system voltage during motor operation
  • Carbon buildup or binding on throttle plate preventing normal motor current behavior

Fault status

⚠️ Status
P2119 — Throttle actuator / throttle body electrical fault detected (motor/current sensor circuit abnormal). May cause reduced power; inspect throttle actuator, wiring, connectors, and battery/charging system.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

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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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