Powertrain, generic (extended)

P24D0 Particulate Matter Sensor Supply Voltage Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P24D0 concerns the power feed of the particulate matter sensor and its control unit, which sinks when the supply line has excess resistance or a short toward ground. Ford's 2023 diesel summary compares battery voltage with the voltage at the sensor while the heater runs at 35 % duty or more, and sets the code if the drop exceeds 1.1 V, 2.1 V or 3 V depending on battery level, within 2 s. VW's 2014 Touareg list uses comparable steps. GM's 18OBDG04 table flags supply under 9 V (Type B) and blocks its other PM sensor tests while P24D0 is active. It is also one of the codes in FCA's PCM bulletin 18-008-23 (Compass diesel, 2019). Check fuse, relay and ground first; P24D0 often comes with other PM sensor codes.

Likely causes

Corroded fuse, relay contact or ground adding resistance
Supply line shorted to ground
Weak battery or charging system
Fault in the sensor control unit

Symptoms

  • Malfunction indicator lamp on
  • Particulate filter monitor does not complete
  • Further particulate sensor codes stored at the same time

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–600
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

particulate matter sensor

Related codes

P24B0P24B3P24AEP0562U02A3

References: fordservicecontent.com, static.nhtsa.gov, gsi.ext.gm.com, static.nhtsa.gov.