Powertrain
generic / SAE
P24FC
Particulate Matter Sensor Heater Control Circuit Driver Current/Temperature Too High
The PM (soot) sensor heater is driven by a current-limited stage so it can burn off accumulated soot before each measurement. The driver reports current or junction temperature above the safe limit and disables itself. Often a partial short across the heater or sensor element after coolant intrusion.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / FC
Possible causes
- Partial short across the heater element high
- Driver overheating due to poor cooling on the module medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 250–1100 €
- Estimated time: 0.6–2.5 h
- Component: pm sensor heater
- Component: heater driver
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012