P2458

Code

LAND ROVER P — Powertrain

Filter regeneration duration diesel particulate

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 26 EN: 282 RU: 95

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Excessive soot loading or partially/fully blocked DPF
Faulty DPF differential pressure sensor or clogged sensor ports
Faulty exhaust temperature sensor(s) upstream or downstream of DPF
Intermittent or damaged wiring/connectors to DPF sensors or ECU
Regeneration control faults in the engine control module (software/calibration)
EGR, turbocharger, fuel delivery or intake issues causing rich/lean conditions and preventing proper regeneration

Symptoms

Malfunction indicator lamp (MIL) / Check Engine light illuminated
Failed or incomplete active DPF regeneration attempts
Reduced engine power or limp-home mode on some vehicles
Frequent or prolonged regen cycles, poor fuel economy
Visible black smoke from exhaust during regen attempts
Possible strong exhaust odor during regeneration

What to check

Read DTCs and freeze-frame data; record supporting codes and live data during a regeneration event
Check for related codes (DPF pressure sensor, exhaust temperature sensors, EGR, turbo, fuel system)
Inspect DPF differential pressure sensor and tubing/ports for blockage or contamination
Check exhaust temperature sensor operation and compare upstream vs downstream temps during warm-up and regen (should show expected rises)
Inspect wiring and connectors for damage, corrosion, or poor connections to sensors and ECU
Measure boost and fueling parameters to confirm the engine can reach regen temperature

Signal parameters

DPF differential pressure (mbar or kPa) before, during and after regen
Upstream exhaust temperature (°C) and downstream exhaust temperature (°C)
Commanded regeneration state/command from ECU (active/inactive)
Elapsed time since regeneration start (seconds/minutes) and expected duration window
Estimated soot mass or soot accumulation value (grams) if available
Boost/charge pressure and EGR position during regen attempts

Diagnostic algorithm

Retrieve P2458 plus all stored/related codes and freeze frame. Note vehicle conditions at code set (engine load, speed, temperature).
Visually inspect DPF differential pressure sensor, hoses/ports and exhaust temperature sensor connectors. Repair any wiring or connector faults.
With a capable scan tool, monitor DPF pressures, upstream/downstream temps and soot mass. Attempt an active/forced regen and observe whether sensors respond and whether regen completes within expected time.
If differential pressure is high and temperatures do not reach expected values, check turbocharger, intake/air filters, and fuel delivery for issues preventing required exhaust temperature.
If sensors show unrealistic values (no change, stuck high/low), bench-test/replace the suspect pressure or temperature sensor(s) and retest.
If sensors are valid but DPF pressure remains high after successful regen attempts, conduct a backpressure/smoke test and consider DPF cleaning or replacement.
After repairs or component replacements, clear codes and perform road/active regen cycles; verify no recurrence and that regen duration falls within expected limits.
If fault persists, check for ECU software updates or calibration bulletins from manufacturer before replacing major components.

Likely causes

Clogged DPF causing extended regen duration
Faulty differential pressure sensor giving incorrect high/low readings
Damaged or contaminated exhaust temperature sensor causing incorrect regen control
Wiring/connectors to sensors intermittent or corroded
System unable to reach required exhaust temperature (turbo or fuel delivery issues)

Fault status

⚠️ Status

DPF regeneration duration fault detected. MIL set. Regeneration did not complete in expected time window or duration outside expected limits; check DPF system and related sensors.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-4 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email

P2458 — Filter regeneration duration diesel particulate