What Does P244A Mean?
The diesel particulate filter differential pressure sensor is reading lower than expected values on Bank 1. This suggests a sensor failure, leak in the sensing system, or actual DPF damage allowing unrestricted flow.
Common Causes
35%
Failed or damaged differential pressure sensor
30%
Disconnected or cracked pressure sensing hoses
20%
Cracked or failed diesel particulate filter substrate
10%
Clogged or pinched sensor hose to upstream port
5%
Wiring fault or poor connector contact at sensor
Diagnostic Steps
1
Step 1: Monitor live differential pressure readings using scan tool at various engine speeds
2
Step 2: Inspect pressure sensor hoses for disconnection, cracks, or blockage
3
Step 3: Test sensor output voltage or frequency against specification
4
Step 4: Check for exhaust leaks between DPF and sensor sampling points
5
Step 5: Verify sensor electrical connections and wiring for corrosion or damage
Estimated Repair Cost
$200 - $2,500
Parts + labor, varies by vehicle and location
The diesel particulate filter differential pressure sensor is reading lower than expected values on Bank 1. This suggests a sensor failure, leak in the sensing system, or actual DPF damage allowing unrestricted flow.
The most common cause of P244A (Diesel Particulate Filter Differential Pressure Too Low Bank 1) is: Failed or damaged differential pressure sensor
Typical repair costs for P244A range from $200 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short distances but continued operation may result in increased emissions, potential engine derate, and failure to meet emissions standards.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P244A to identify the root cause.
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Quick Info
Category
Powertrain
System
Diesel Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
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