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Home / DTC / P244B — Particulate Filter Differential Pressure Too High Bank 1

P244B — Particulate Filter Differential Pressure Too High Bank 1

Detailed page for trouble code P244B.

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P244B

Generic P — Powertrain

Particulate Filter Differential Pressure Too High Bank 1

Brand: Generic
Type: P — Powertrain
Views: UK: 24 EN: 50 RU: 40
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Clogged/restricted DPF (soot/ash buildup)
  • Blocked or collapsed sensor hose(s) or clogged filter ports
  • Faulty differential pressure sensor
  • Damaged sensor wiring or poor connector connection (open/short/corrosion)
  • Exhaust leak or restriction between sensor measurement ports and DPF
  • Failed or incomplete regeneration (regeneration system fault)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power or limp-home mode during/after code set
  • Difficulty completing or failure to initiate forced regeneration
  • Increased fuel consumption
  • Black smoke from exhaust under load
  • Noticeable exhaust backpressure or unusual exhaust noise

What to check

  • Retrieve freeze frame and readiness data with a scan tool; note engine load/RPM when code set
  • Check live differential pressure (DP) sensor readings under various conditions (idle, load, after regen)
  • Visual inspection of DP sensor, hoses, and connectors for damage, restrictions, kinks or contamination
  • Check for exhaust leaks upstream/downstream of DPF and for damaged or missing sensor ports
  • Inspect DPF for visible damage; check soot/ash accumulation history and service interval
  • Scan for related codes (EGR, fuel control, turbo, NOx) that could raise soot production

Signal parameters

  • Typical sensor supply: reference 5V (vehicle-specific)
  • Common sensor output range: ~0.5–4.5 V (vehicle-specific)
  • Typical differential pressure ranges (generic): idle/low load
  • Note: exact voltages/pressures vary by vehicle — confirm values from service information

Diagnostic algorithm

  1. Verify code and related codes with a scan tool; record freeze frame and DP sensor live data. 2) Visually inspect sensor, hoses and connectors for damage, blockage or contamination; replace or clear hose blockages. 3) With engine off, remove and inspect sensor hoses/ports for soot plugs; clean or replace as needed. 4) Backprobe sensor connector: verify reference voltage, ground, and signal are within manufacturer spec. 5) Compare sensor signal to direct pressure readings using a manometer or calibrated pressure gauge at both DPF pressure ports. 6) Perform a forced regeneration and observe DP change: a healthy DPF will show a fall in DP during/after regen; a high DP that does not fall indicates restriction. 7) If sensor circuit and hoses are good but DP remains high, inspect DPF (visual inspection or pressure/flow test) and consider DPF cleaning or replacement. 8) Investigate upstream causes of excess soot (fuel delivery, turbocharger, EGR) if DPF loads quickly. 9) Repair or replace failed components, clear codes, and verify proper operation on a road or dyno test cycle.

Likely causes

  • DPF heavily loaded with soot/ash (most common)
  • Blocked/crushed vacuum/tube between sensor and DPF port
  • Differential pressure sensor failed or out of range
  • Wiring fault at sensor connector (corrosion, broken wire)
  • Exhaust leak that changes pressure readings

Fault status

⚠️ Status
PCM detected excessive differential pressure across the particulate filter on Bank 1 — indicates possible DPF restriction or sensor/circuit fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

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Code

P244B

LAND ROVER P — Powertrain

Diesel particulate filter differential pressure very high (Bank 1)

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 10 EN: 32 RU: 27
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Clogged/restricted DPF (soot/ash buildup)
  • Blocked or collapsed sensor hose(s) or clogged filter ports
  • Faulty differential pressure sensor
  • Damaged sensor wiring or poor connector connection (open/short/corrosion)
  • Exhaust leak or restriction between sensor measurement ports and DPF
  • Failed or incomplete regeneration (regeneration system fault)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power or limp-home mode during/after code set
  • Difficulty completing or failure to initiate forced regeneration
  • Increased fuel consumption
  • Black smoke from exhaust under load
  • Noticeable exhaust backpressure or unusual exhaust noise

What to check

  • Retrieve freeze frame and readiness data with a scan tool; note engine load/RPM when code set
  • Check live differential pressure (DP) sensor readings under various conditions (idle, load, after regen)
  • Visual inspection of DP sensor, hoses, and connectors for damage, restrictions, kinks or contamination
  • Check for exhaust leaks upstream/downstream of DPF and for damaged or missing sensor ports
  • Inspect DPF for visible damage; check soot/ash accumulation history and service interval
  • Scan for related codes (EGR, fuel control, turbo, NOx) that could raise soot production

Signal parameters

  • Typical sensor supply: reference 5V (vehicle-specific)
  • Common sensor output range: ~0.5–4.5 V (vehicle-specific)
  • Typical differential pressure ranges (generic): idle/low load
  • Note: exact voltages/pressures vary by vehicle — confirm values from service information

Diagnostic algorithm

  1. Verify code and related codes with a scan tool; record freeze frame and DP sensor live data. 2) Visually inspect sensor, hoses and connectors for damage, blockage or contamination; replace or clear hose blockages. 3) With engine off, remove and inspect sensor hoses/ports for soot plugs; clean or replace as needed. 4) Backprobe sensor connector: verify reference voltage, ground, and signal are within manufacturer spec. 5) Compare sensor signal to direct pressure readings using a manometer or calibrated pressure gauge at both DPF pressure ports. 6) Perform a forced regeneration and observe DP change: a healthy DPF will show a fall in DP during/after regen; a high DP that does not fall indicates restriction. 7) If sensor circuit and hoses are good but DP remains high, inspect DPF (visual inspection or pressure/flow test) and consider DPF cleaning or replacement. 8) Investigate upstream causes of excess soot (fuel delivery, turbocharger, EGR) if DPF loads quickly. 9) Repair or replace failed components, clear codes, and verify proper operation on a road or dyno test cycle.

Likely causes

  • DPF heavily loaded with soot/ash (most common)
  • Blocked/crushed vacuum/tube between sensor and DPF port
  • Differential pressure sensor failed or out of range
  • Wiring fault at sensor connector (corrosion, broken wire)
  • Exhaust leak that changes pressure readings

Fault status

⚠️ Status
PCM detected excessive differential pressure across the particulate filter on Bank 1 — indicates possible DPF restriction or sensor/circuit fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

P2002 P2458 P2463 P2440 P242F
160

Browse 160 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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