P244B Trouble Code — Diesel Particulate Filter Pressure High (Blocked DPF?)

🔍 What Does P244B Mean?

P244B = Diesel Particulate Filter Differential Pressure Too High

👉 The ECU detects that the pressure difference across the DPF is higher than expected.

👉 In simple terms:

• Exhaust gases cannot pass freely
• The DPF is restricted or clogged

⚠️ How Serious Is P244B?

Severity: ⭐⭐⭐⭐⭐ (High / Critical)

• ❌ Risk of DPF damage
• ❌ Turbo stress
• ❌ Engine overheating
• ❌ Limp mode

👉 Must be fixed URGENTLY

🚨 Common Symptoms

• Check Engine Light
• DPF warning light
• Loss of power
• Limp mode
• Increased fuel consumption
• High exhaust temperatures
• Black smoke (sometimes)

🧠 Most Common Causes

1️⃣ Clogged DPF (Most Common)

• Soot accumulation
• No regeneration
• Short driving cycles

💰 Cost:

• Cleaning: $150 – $400
• Replacement: $800 – $3000

2️⃣ Failed DPF Regeneration

• Incomplete regen cycles
• Driving only short distances

👉 Very common in city driving

3️⃣ Faulty DPF Pressure Sensor

• Incorrect high reading
• Sensor malfunction

💰 Cost: $80 – $250

4️⃣ Blocked or Melted Pressure Hoses

• Incorrect pressure measurement
• Sensor reads too high

5️⃣ Exhaust Restriction / Damage

• Collapsed pipe
• Blocked catalyst

🔧 Step-by-Step Diagnosis

1️⃣ Scan Live Data

Check:

• DPF pressure (kPa)
• Idle vs acceleration

👉 High values = restriction

2️⃣ Check DPF Condition

• Soot load
• Regeneration history

3️⃣ Inspect Pressure Hoses

• Cracks
• Blockage
• Melted lines

4️⃣ Test Pressure Sensor

• Compare readings
• Replace if needed

5️⃣ Check Regeneration System

• Injectors
• EGR
• Temperature sensors

🛠️ How to Fix P244B

✔️ Step 1 — Perform DPF Regeneration

👉 Forced regen using scan tool

✔️ Step 2 — Clean the DPF

• Chemical cleaning
• Professional cleaning

✔️ Step 3 — Replace Pressure Sensor

✔️ Step 4 — Replace DPF (Worst Case)

💰 Repair Cost Breakdown

❗ Common Mistakes

• ❌ Ignoring early symptoms
• ❌ Replacing sensor when DPF is clogged
• ❌ Driving only short trips
• ❌ Skipping regeneration

⚖️ P244B vs P244A

👉 Simple:

• P244A = leak / sensor issue
• P244B = blockage / restriction

🚗 Can You Drive With P244B?

👉 Short answer: NO (or only very short distance)

• Risk of major damage
• Can destroy DPF or turbo

📊 Real-World Insight

👉 Typical causes:

• 70% → clogged DPF
• 20% → failed regen
• 10% → sensor / hoses

🚀 Final Verdict

• Problem: High DPF pressure
• Main cause: clogged filter
• Difficulty: Medium–High
• Cost: $150 – $3000
• Driveable: ❌ No