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Home / DTC / P1336 — Piston position sensor 2

P1336 — Piston position sensor 2

Detailed page for trouble code P1336.

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P1336

MITSUBISHI P — Powertrain

Piston position sensor 2

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

Causes

  • Faulty piston position sensor (sensor 2)
  • Damaged wiring harness or connector (open, short to voltage or ground, corrosion)
  • Poor electrical connection at sensor or ECM
  • Intermittent connector contact (moisture, bent pins)
  • Faulty ECM or internal driver circuit
  • Mechanical timing or target wheel damage (reluctor, tone wheel, cam/crank alignment)

Symptoms

  • Check Engine Light illuminated (MIL)
  • Hard start or no start
  • Rough idle or engine misfire
  • Reduced power, stalling or intermittent loss of drive
  • Poor fuel economy or hesitation on acceleration
  • Possible cranking without firing or irregular RPM signal

What to check

  • Retrieve DTCs and freeze-frame data with a scan tool; note RPM and load at fault
  • Check for related codes (crank/cam position, misfire codes)
  • Visually inspect sensor, connector and wiring for damage, corrosion or loose pins
  • Backprobe sensor connector to verify reference voltage, ground and signal with key ON and while cranking
  • Wiggle harness and connector while monitoring signal to check for intermittent faults
  • Measure sensor resistance (if applicable) and compare to specification or known-good sensor

Signal parameters

  • Reference/supply voltage typically ~5 V (Hall-effect) — confirm vehicle-specific value
  • Hall-effect output: digital square wave ~0–5 V; frequency proportional to engine speed
  • Magnetic pickup (variable reluctor) output: AC voltage that increases with rpm (may be 0.2–4 V AC at cranking)
  • Expected clean, consistent pulses without dropout or noise; waveform shape should match other position sensors
  • Typical sensor resistance varies by design — compare to factory spec or known-good part

Diagnostic algorithm

  1. Step 1: Scan and record all stored/active codes and freeze frame. Note any related crank/cam or misfire codes.
  2. Step 2: Perform a thorough visual inspection of the piston position sensor 2 connector, wiring harness and ECM connector. Repair obvious damage.
  3. Step 3: With connector connected, backprobe the sensor pins. Verify reference voltage and ground are present with ignition ON.
  4. Step 4: Crank the engine and observe the signal line with a digital multimeter (AC for VR type) or oscilloscope (preferred). Look for clean pulses matching engine speed.
  5. Step 5: Wiggle the harness and connectors while monitoring signal to detect intermittent faults. Check for corrosion or poor pin fit.
  6. Step 6: If the signal is missing or out of spec, disconnect sensor and measure its internal resistance (if specified) and inspect reluctor/target for damage.
  7. Step 7: If wiring and sensor are OK, test continuity and for shorts between the sensor and ECM. Repair wiring as needed.
  8. Step 8: If wiring and sensor check good but fault persists, consider replacing the sensor with a known-good unit and retest.
  9. Step 9: If replacement sensor does not restore correct signal, suspect ECM driver fault; verify with proper bench/vehicle diagnostics before replacing ECM.
  10. Step 10: Clear codes and test drive to confirm repair. Monitor live data and waveform for intermittent issues.

Likely causes

  • Sensor wiring open/short (most common)
  • Corroded/loose connector at sensor
  • Failed sensor element (Hall effect or magnetic pickup)
  • Damaged reluctor/tone wheel or misaligned timing component

Fault status

⚠️ Status
P1336 - Piston Position Sensor 2 Circuit Malfunction (signal missing/erratic)
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0 - 2.5 hours
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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