P24E0 code meaning
Reductant Purge Control Valve B Stuck Closed
Powertrain system Generic code P24xx codes Check engine light
What P24E0 means
Stuck closed means purge valve B does not move into its emptying position when commanded after shut-down, so the line it serves stays filled with fluid under residual pressure. In normal dosing this goes unnoticed; the risk appears in frost, when the trapped DEF freezes in hose, pump or injector and can crack them. No manufacturer documents P24E0 publicly. How a blocked valve A is detected on GM's Duramax diesel: the pressure drop during the purge phase is measured, and less than 50 kPa sets P20A1, Type A. Pico's Denoxtronic 2.2 description shows that the purge relies on the reversing valve and the closed injector to create vacuum. CARB demands monitoring of SCR components. P24DF is the reverse failure.
P24E0 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P24E0
- Malfunction indicator lamp on
- Frozen or burst DEF line or injector after frost
Common causes of P24E0
- Most likelyValve B seized by crystallised DEF or corrosion
- PossibleWeak coil that no longer pulls the valve over
- Less likelyIntermittent open in the control circuit during shut-down
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Reductant purge valve b
What each part of P24E0 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). |
| E0 | The exact fault in that area. |
What to do next
- Note P24E0 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 P24E0
What does P24E0 mean?
P24E0 means "Reductant Purge Control Valve B Stuck Closed". Stuck closed means purge valve B does not move into its emptying position when commanded after shut-down, so the line it serves stays filled with fluid under residual pressure. It is a generic code, so it means the same on every make.
Is it safe to drive with P24E0?
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 P24E0 fail an emissions test?
Yes, it can. P24E0 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 P24E0 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P24E0 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.