P24C7 code meaning
Particulate Matter Sensor Temperature Circuit Range/Performance
Powertrain system Generic code P24xx codes Check engine light
What P24C7 means
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.
P24C7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P24C7
- Malfunction indicator lamp on
- Particulate filter monitor does not complete
Common causes of P24C7
- Most likelySensor element damaged or temperature track drifted
- PossibleExtra resistance between sensor and sensor control unit
- Less likelyFaulty exhaust temperature sensor used as reference
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Particulate matter sensor
What each part of P24C7 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| C7 | The exact fault in that area. |
What to do next
- Note P24C7 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P24C7
What does P24C7 mean?
P24C7 means "Particulate Matter Sensor Temperature Circuit Range/Performance". P24C7 checks whether the temperature the particulate matter sensor reports fits the exhaust around it. It is a generic code, so it means the same on every make.
Is it safe to drive with P24C7?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P24C7 fail an emissions test?
Yes, it can. P24C7 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P24C7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P24C7 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.