P24DA code meaning
Particulate Matter Sensor Exhaust Sample Error Bank 1
Powertrain system Generic code P24xx codes Check engine light
What P24DA means
P24DA checks that the particulate matter sensor actually samples exhaust gas, which is how the system detects a sensor that has been pulled out, sits in a blocked protection tube or is mounted wrongly. Ford's 2023 diesel summary runs it once per drive in protective heating mode and fails it if the summed sensor voltage change during exhaust flow changes stays under 0.5 V, over about 3 minutes. GM's 25OBDG04A table watches filtered heater power, sets the code below 1.66 and rates it Type A, so the lamp comes on after one trip. Bulletin 18-2225 lists P24DA among the codes cured by a new sensor on 2017–2018 Super Duty diesels. Because a sensor outside the exhaust would hide a failed filter, the code counts as emissions-relevant; P2002 reports the filter itself.
P24DA at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P24DA
- Malfunction indicator lamp on
- Particulate filter monitor does not complete
Common causes of P24DA
- Most likelyProtection tube clogged
- PossibleSensor removed from the exhaust or installed wrongly
- PossibleSensor no longer responding to exhaust flow
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 P24DA 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). |
| DA | The exact fault in that area. |
What to do next
- Note P24DA 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 P24DA
What does P24DA mean?
P24DA means "Particulate Matter Sensor Exhaust Sample Error Bank 1". P24DA checks that the particulate matter sensor actually samples exhaust gas, which is how the system detects a sensor that has been pulled out, sits in a blocked protection tube or is mounted wrongly. It is a generic code, so it means the same on every make.
Is it safe to drive with P24DA?
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 P24DA fail an emissions test?
Yes, it can. P24DA 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 P24DA to fix?
Difficulty: medium. A typical repair takes 0.5 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P24DA 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.