Code
P2458
Generic
P — Powertrain
Particulate Filter Regeneration Duration Bank 1
Views:
UK: 32
EN: 122
RU: 54
AI status
Completed
Completed
100%
Causes
- Failed or slow/extended regeneration cycle
- Clogged or heavily loaded DPF (soot/ash)
- Faulty differential pressure (DPF pressure) sensor
- Faulty DPF inlet/outlet temperature sensor(s)
- Exhaust leaks upstream or downstream of the DPF
- Defective wiring or connector to DPF-related sensors or actuator devices
Symptoms
- Malfunction Indicator Lamp (MIL) or check engine light illuminated
- Frequent or failed forced regenerations recorded
- Reduced engine performance or limp-in mode
- Poor fuel economy during regeneration events
- Visible black smoke during/after failed regen attempts
- High exhaust temperatures reported during regen
What to check
- Read all stored DTCs and pending codes, note freeze-frame data and failure counts
- Use a capable scan tool to inspect live data: DPF soot mass, differential pressure, inlet/outlet temperatures, commanded vs actual regen state and regen duration history
- Perform visual inspection of exhaust system for leaks, damage or missing hardware upstream of the DPF
- Inspect wiring and connectors for the DPF pressure and temperature sensors for corrosion, damage, or poor connections
- Check for related engine faults (misfire, fuel pressure, injector faults) that can increase soot production
- Confirm whether previous forced regens have been attempted and their reported durations/outcomes
Signal parameters
- DPF differential pressure (kPa or mbar) — expected range varies by vehicle
- DPF inlet temperature and DPF outlet temperature (°C)
- Reported soot mass or estimated soot load (grams)
- Commanded regeneration state and regen timer/duration (seconds)
- Engine RPM and load (%) during regen
- Fuel rail pressure and injector pulse width (for injection-based regen control)
Diagnostic algorithm
- Connect a factory-level or professional scan tool and record all DTCs, freeze-frame and live data related to regeneration.
- Confirm the code is current (not historical); clear codes and attempt to reproduce under controlled conditions or perform a monitored forced regeneration if safe to do so.
- Inspect exhaust system for leaks or damage from turbocharger to DPF; repair any leaks before further testing.
- Visually inspect and test DPF differential pressure sensor: check plumbing for blockage or leaks, back-probe connector, verify sensor output vs. known values with the engine off and during idle/loaded conditions.
- Test DPF temperature sensors (inlet/outlet) for correct resistance/voltage and response to heating. Replace if out of specification or intermittent.
- Check engine for conditions that increase soot production (EGR faults, turbo faults, fueling issues, misfires) and repair as needed.
- If sensors and engine systems are good but high soot load persists, perform a controlled forced regeneration under tool guidance and monitor regen duration, temps, pressures and soot mass change.
- If forced regen fails or DPF is severely restricted (pressure remains high, temps do not rise properly, soot mass does not reduce), remove and inspect DPF for physical damage, excessive ash or blockage; consider professional cleaning or replacement.
- After repair or component replacement, clear codes and verify successful regen cycles and that no new codes return. Complete any required adaptations or DPF learned value resets per manufacturer procedure.
Likely causes
- High soot accumulation in DPF requiring longer regeneration
- DPF differential pressure sensor out of range or intermittent
- DPF temperature sensor reading incorrect (prevents proper regen control)
- Exhaust leak between turbo and DPF causing wrong pressure/temperature readings
- Restricted or damaged DPF (physical blockage or high ash content)
Fault status
Status
P2458 — Particulate Filter Regeneration Duration Bank 1. Regeneration duration out of expected range; inspect DPF, sensors and regeneration control.
Repair difficulty: Hard
Diagnostic time: 2.0-5.0 hours
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Code
P2458
ISUZU
P — Powertrain
DPD Regeneration Duration
Views:
UK: 21
EN: 85
RU: 46
AI status
Completed
Completed
100%
Causes
- Failed or slow/extended regeneration cycle
- Clogged or heavily loaded DPF (soot/ash)
- Faulty differential pressure (DPF pressure) sensor
- Faulty DPF inlet/outlet temperature sensor(s)
- Exhaust leaks upstream or downstream of the DPF
- Defective wiring or connector to DPF-related sensors or actuator devices
Symptoms
- Malfunction Indicator Lamp (MIL) or check engine light illuminated
- Frequent or failed forced regenerations recorded
- Reduced engine performance or limp-in mode
- Poor fuel economy during regeneration events
- Visible black smoke during/after failed regen attempts
- High exhaust temperatures reported during regen
What to check
- Read all stored DTCs and pending codes, note freeze-frame data and failure counts
- Use a capable scan tool to inspect live data: DPF soot mass, differential pressure, inlet/outlet temperatures, commanded vs actual regen state and regen duration history
- Perform visual inspection of exhaust system for leaks, damage or missing hardware upstream of the DPF
- Inspect wiring and connectors for the DPF pressure and temperature sensors for corrosion, damage, or poor connections
- Check for related engine faults (misfire, fuel pressure, injector faults) that can increase soot production
- Confirm whether previous forced regens have been attempted and their reported durations/outcomes
Signal parameters
- DPF differential pressure (kPa or mbar) — expected range varies by vehicle
- DPF inlet temperature and DPF outlet temperature (°C)
- Reported soot mass or estimated soot load (grams)
- Commanded regeneration state and regen timer/duration (seconds)
- Engine RPM and load (%) during regen
- Fuel rail pressure and injector pulse width (for injection-based regen control)
Diagnostic algorithm
- Connect a factory-level or professional scan tool and record all DTCs, freeze-frame and live data related to regeneration.
- Confirm the code is current (not historical); clear codes and attempt to reproduce under controlled conditions or perform a monitored forced regeneration if safe to do so.
- Inspect exhaust system for leaks or damage from turbocharger to DPF; repair any leaks before further testing.
- Visually inspect and test DPF differential pressure sensor: check plumbing for blockage or leaks, back-probe connector, verify sensor output vs. known values with the engine off and during idle/loaded conditions.
- Test DPF temperature sensors (inlet/outlet) for correct resistance/voltage and response to heating. Replace if out of specification or intermittent.
- Check engine for conditions that increase soot production (EGR faults, turbo faults, fueling issues, misfires) and repair as needed.
- If sensors and engine systems are good but high soot load persists, perform a controlled forced regeneration under tool guidance and monitor regen duration, temps, pressures and soot mass change.
- If forced regen fails or DPF is severely restricted (pressure remains high, temps do not rise properly, soot mass does not reduce), remove and inspect DPF for physical damage, excessive ash or blockage; consider professional cleaning or replacement.
- After repair or component replacement, clear codes and verify successful regen cycles and that no new codes return. Complete any required adaptations or DPF learned value resets per manufacturer procedure.
Likely causes
- High soot accumulation in DPF requiring longer regeneration
- DPF differential pressure sensor out of range or intermittent
- DPF temperature sensor reading incorrect (prevents proper regen control)
- Exhaust leak between turbo and DPF causing wrong pressure/temperature readings
- Restricted or damaged DPF (physical blockage or high ash content)
Fault status
Status
P2458 — Particulate Filter Regeneration Duration Bank 1. Regeneration duration out of expected range; inspect DPF, sensors and regeneration control.
Repair difficulty: Hard
Diagnostic time: 2.0-5.0 hours
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Code
P2458
LAND ROVER
P — Powertrain
Filter regeneration duration diesel particulate
Views:
UK: 13
EN: 71
RU: 36
AI status
Completed
Completed
100%
Causes
- Failed or slow/extended regeneration cycle
- Clogged or heavily loaded DPF (soot/ash)
- Faulty differential pressure (DPF pressure) sensor
- Faulty DPF inlet/outlet temperature sensor(s)
- Exhaust leaks upstream or downstream of the DPF
- Defective wiring or connector to DPF-related sensors or actuator devices
Symptoms
- Malfunction Indicator Lamp (MIL) or check engine light illuminated
- Frequent or failed forced regenerations recorded
- Reduced engine performance or limp-in mode
- Poor fuel economy during regeneration events
- Visible black smoke during/after failed regen attempts
- High exhaust temperatures reported during regen
What to check
- Read all stored DTCs and pending codes, note freeze-frame data and failure counts
- Use a capable scan tool to inspect live data: DPF soot mass, differential pressure, inlet/outlet temperatures, commanded vs actual regen state and regen duration history
- Perform visual inspection of exhaust system for leaks, damage or missing hardware upstream of the DPF
- Inspect wiring and connectors for the DPF pressure and temperature sensors for corrosion, damage, or poor connections
- Check for related engine faults (misfire, fuel pressure, injector faults) that can increase soot production
- Confirm whether previous forced regens have been attempted and their reported durations/outcomes
Signal parameters
- DPF differential pressure (kPa or mbar) — expected range varies by vehicle
- DPF inlet temperature and DPF outlet temperature (°C)
- Reported soot mass or estimated soot load (grams)
- Commanded regeneration state and regen timer/duration (seconds)
- Engine RPM and load (%) during regen
- Fuel rail pressure and injector pulse width (for injection-based regen control)
Diagnostic algorithm
- Connect a factory-level or professional scan tool and record all DTCs, freeze-frame and live data related to regeneration.
- Confirm the code is current (not historical); clear codes and attempt to reproduce under controlled conditions or perform a monitored forced regeneration if safe to do so.
- Inspect exhaust system for leaks or damage from turbocharger to DPF; repair any leaks before further testing.
- Visually inspect and test DPF differential pressure sensor: check plumbing for blockage or leaks, back-probe connector, verify sensor output vs. known values with the engine off and during idle/loaded conditions.
- Test DPF temperature sensors (inlet/outlet) for correct resistance/voltage and response to heating. Replace if out of specification or intermittent.
- Check engine for conditions that increase soot production (EGR faults, turbo faults, fueling issues, misfires) and repair as needed.
- If sensors and engine systems are good but high soot load persists, perform a controlled forced regeneration under tool guidance and monitor regen duration, temps, pressures and soot mass change.
- If forced regen fails or DPF is severely restricted (pressure remains high, temps do not rise properly, soot mass does not reduce), remove and inspect DPF for physical damage, excessive ash or blockage; consider professional cleaning or replacement.
- After repair or component replacement, clear codes and verify successful regen cycles and that no new codes return. Complete any required adaptations or DPF learned value resets per manufacturer procedure.
Likely causes
- High soot accumulation in DPF requiring longer regeneration
- DPF differential pressure sensor out of range or intermittent
- DPF temperature sensor reading incorrect (prevents proper regen control)
- Exhaust leak between turbo and DPF causing wrong pressure/temperature readings
- Restricted or damaged DPF (physical blockage or high ash content)
Fault status
Status
P2458 — Particulate Filter Regeneration Duration Bank 1. Regeneration duration out of expected range; inspect DPF, sensors and regeneration control.
Repair difficulty: Hard
Diagnostic time: 2.0-5.0 hours
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