Powertrain, generic (extended)

P24C7 Particulate Matter Sensor Temperature Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P24C7 checks whether the temperature the particulate matter sensor reports fits the exhaust around it. Ford's 2023 diesel summary does an offset test after a cold soak of at least 6 hours, flagging more than 45 °C against the mean of the exhaust temperature sensors, and a dynamic test while driving that fails below -150 or above 60 °C against a model. VW's 2014 Touareg list uses 60 K and -100 K. GM's 18OBDG04 table sets it at more than 100 °C deviation in 200 of 250 samples (Type B) and names a damaged sensor or extra harness resistance as causes. Mazda treats it as a two-cycle code on the CX-5 SKYACTIV-D 2.2 (01-005-22); Ford 18-2225 and GM coverage 16018 replace the sensor. P24C6 is the electrical fault.

Likely causes

Sensor element damaged or temperature track drifted
Extra resistance between sensor and sensor control unit
Faulty exhaust temperature sensor used as reference

Symptoms

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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€150–700
Time0.5–2 h

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

Parts involved

particulate matter sensor

Related codes

P24C6P24C8P24C9P24CA

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