OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P24FC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPartial short across the heater element
- PossibleDriver overheating due to poor cooling on the module
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.6–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Pm Sensor Heater, Heater Driver
Related codes
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- P24FAExhaust Aftertreatment Fuel Air Purge Valve Control Circuit Low
- P24FBExhaust Aftertreatment Fuel Air Purge Valve Control Circuit High
- P24FDParticulate Filter A Incorrect
- P24FESCR Catalyst Incorrect
- P24FFReductant Temperature Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.