Powertrain, generic (extended)

P24C6 Particulate Matter Sensor Temperature Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Inside the particulate matter sensor a meander-shaped platinum track measures element temperature, which the sensor needs to control its heater. P24C6 is the general circuit fault of that temperature signal. Ford's 2023 diesel summary flags a signal below 0.3 V or above 3 V for 2 s; VW's 2014 Touareg list and GM's 14OBDG04 table use the same band (GM Type B). On the 2018–2019 CX-5 SKYACTIV-D 2.2, Mazda (bulletin 01-005-22) links it to condensate cracking the element, sets it after one drive cycle and supplies a revised sensor. Ford fits a new sensor under 18-2225 (Super Duty 6.7L, 2017–2018), and GM special coverage 16018 covers 2014–2015 Cruze diesels. P24C8 and P24C9 split the fault into low and high.

Likely causes

Sensor element cracked by condensate
Open or shorted temperature line in the harness
Fault in the sensor control unit

Symptoms

  • Malfunction indicator lamp on
  • Particulate filter monitor does not complete

Repair estimate

DifficultyMediumDIY possible
Parts and labour€150–700
Time0.5–1.5 h

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

Parts involved

particulate matter sensor

Related codes

P24C7P24C8P24C9P24CAP24AE

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