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MID 128 PID 81 FMI 3Severity: Warning

MID 128 PID 81 FMI 3: Particulate Filter - Voltage Above Normal (Volvo)

Quick Answer

Particulate Filter - Voltage Above Normal (Volvo)

Code
MID 128 PID 81 FMI 3
Severity
Warning
Applies to
Check OEM application
Can I drive?
Driving suitability is not established by this code alone.

Common Symptoms

  • Malfunction indicator lamp illuminated
  • Particulate trap pressure signal may read above the expected range

Likely Causes

  • Particulate Trap Pressure (PTP) Sensor failure
  • Faulty sensor connector
  • Short to battery on metering side
  • Open in ground line

Common Fixes

  • Check for shorts to battery in sensor wiring
  • Inspect ground circuit continuity
  • Verify connector pins are not damaged
  • Replace faulty sensor
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What does MID 128 PID 81 FMI 3 mean?

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Particulate Filter - Voltage Above Normal (Volvo)

Detailed guide for MID 128 PID 81 FMI 3

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MID 128 PID 81 FMI 3 - Particulate Filter

**Fault Type:** Voltage above normal or shorted to high source

Fault Condition

  • Short to battery on the metering side
  • Open in the ground line

Possible Symptoms

  • Malfunction indicator lamp illuminated

Possible Causes

  • Particulate Trap Pressure (PTP) Sensor failure
  • Faulty Particulate Trap Pressure (PTP) Sensor connector
  • Faulty harness

Diagnostic Tips

1. Check for shorts to battery voltage in sensor wiring

2. Inspect ground circuit for continuity

3. Verify 5V reference and signal circuits are within spec

4. Check connector pins for damage or corrosion

5. Disconnect sensor and check wiring harness side for proper voltages

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