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Home / DTC / P0460 — Fuel level sensor

P0460 — Fuel level sensor

Detailed page for trouble code P0460.

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Code

P0460

MITSUBISHI P — Powertrain

Fuel level sensor

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

Causes

  • Faulty fuel level sender (fuel tank module)
  • Open or shorted wiring between sender and ECM/cluster
  • Corroded, loose or damaged connector at sender or ECM
  • Poor or missing ground or reference voltage to sender
  • Instrument cluster or ECM input fault
  • Float stuck or mechanically binding in tank

Symptoms

  • Malfunction Indicator Lamp (MIL/CEL) illuminated
  • Fuel gauge shows empty, full, or erratic/unstable readings
  • Incorrect distance-to-empty / range calculations
  • Fuel gauge needle jumps or is frozen
  • Possible failure to log accurate fuel level data to trip computer

What to check

  • Read freeze frame and live data with scan tool; note fuel level signal and any related codes
  • Visually inspect connectors at fuel pump/sender and ECM/cluster for corrosion, bent pins, water ingress, or damage
  • Wiggle test wiring while monitoring fuel level signal for intermittent faults
  • Verify reference voltage (typically 5 V) and sensor ground at sender connector with key ON
  • Measure sender signal voltage while moving float (or pump assembly) — signal should vary smoothly
  • Measure sender resistance with tank access (harness disconnected) across full-to-empty float travel

Signal parameters

  • Typical system uses a variable-resistance sender producing a 0–5 V signal to the ECM/cluster (manufacturer values vary)
  • Common symptom values: ~0–1 V (one extreme e.g., empty) to ~4–5 V (other extreme, full) depending on design
  • Open circuit = no/very high resistance and signal may read near 0 V or float to an ECU default
  • Short to ground ≈ 0 V, short to battery ≈ reference voltage (~5 V)
  • Exact resistance range varies by vehicle; consult Mitsubishi service data for model-specific ohms-per-position values

Diagnostic algorithm

  1. Connect a professional scan tool. Confirm P0460 is current or history and record freeze frame/live fuel level values.
  2. Visually inspect the fuel sender harness, connector, and ECM connector for corrosion, damage, or water intrusion. Repair obvious issues.
  3. With ignition ON (engine OFF), backprobe the sender connector: verify reference voltage (usually ~5 V) and a good ground. If reference or ground missing, trace wiring to ECM/cluster.
  4. Probe the sender signal line while moving the fuel float (or slowly lift/lower sender assembly on bench). Signal voltage should change smoothly across range. Erratic or no change indicates sender or wiring fault.
  5. Disconnect the sender and measure resistance across sender terminals while moving the float. Compare to manufacturer specs or confirm smooth, monotonic change. Replace sender if resistance is open, shorted, or non-linear.
  6. Check continuity between sender signal and ECM input; check for short to ground or to battery with ignition OFF. Repair wiring harness as needed.
  7. If wiring and sender check good, test/inspect the instrument cluster input or ECM input driver circuit (may require oscilloscope or manufacturer diagnostic flow). Replace module only after confirming external wiring/sender are good.
  8. After repairs, clear codes and verify repair with live data and a short road test to ensure fuel level reports correctly and no reoccurrence.

Likely causes

  • Corroded/damaged connector at the fuel pump module or in-tank sender
  • Open/shorted harness between sender and ECU/cluster (common at chassis harness or underbody chafe points)
  • Failed sender (variable resistor or hall-effect module)
  • Float stuck on internal debris or foam inside tank

Fault status

⚠️ Status
P0460 — Fuel Level Sensor Circuit Malfunction. ECM detected abnormal or missing signal from fuel level sender; MIL illuminated. May be caused by open/shorted wiring, failed sender, or poor reference/ground.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3.0 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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