P24D0Particulate Matter Sensor Supply Voltage Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Malfunction indicator lamp on
- Particulate filter monitor does not complete
- Further particulate sensor codes stored at the same time
- Likely causes
- LikelyCorroded fuse, relay contact or ground adding resistance
- PossibleSupply line shorted to ground
- RareWeak battery or charging system
- RareFault in the sensor control unit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.