P246B code meaning
Vehicle Conditions Incorrect for Particulate Filter Regeneration
Powertrain system Generic code P24xx codes Check engine light
What P246B means
P246B says the controller wanted to clean the particulate filter but the vehicle did not offer the conditions its strategy needs, for example enough exhaust heat, a long enough run or a functioning air path. It describes a failed or blocked regeneration request rather than a defective part on its own, so the real cause is usually stored beside it. Land Rover documents exactly that on Range Rover and Range Rover Sport 2016–2018 and Discovery 2017–2018 with the 3.0 L TDV6: P246B-00 and P2463-00 can accompany P0234-77 when the intake air shutoff throttle has failed, and bulletins LTB01204NAS1 to NAS3 call for a new throttle followed by a dynamic regeneration. Short trips and long idling make it worse, and if soot keeps rising P2463 or a power limit follows. MIL behaviour differs by maker.
P246B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P246B
- Regeneration does not start or is aborted repeatedly
- Filter warning or rising soot load
- MIL on together with the root-cause code on some vehicles
Common causes of P246B
- Most likelyAnother stored fault (e.g. intake throttle, sensors) blocking regeneration
- PossibleFailed intake air shutoff throttle (Land Rover TDV6)
- PossibleShort trips or long idling without enough exhaust heat
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
DPF b1
What each part of P246B 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). |
| 6B | The exact fault in that area. |
What to do next
- Note P246B 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 P246B
What does P246B mean?
P246B means "Vehicle Conditions Incorrect for Particulate Filter Regeneration". P246B says the controller wanted to clean the particulate filter but the vehicle did not offer the conditions its strategy needs, for example enough exhaust heat, a long enough run or a functioning air path. It is a generic code, so it means the same on every make.
Is it safe to drive with P246B?
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 P246B fail an emissions test?
Yes, it can. P246B 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 P246B to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P246B 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.