What Does P244D Mean?
The exhaust temperature on bank 1 has exceeded the safe threshold for diesel particulate filter (DPF) regeneration. This prevents the regeneration cycle from completing properly and can lead to DPF damage or inefficient operation.
Common Causes
35%
Faulty exhaust temperature sensor providing incorrect readings
30%
Excessive post-injection fuel causing uncontrolled regeneration temperatures
20%
Restricted exhaust flow causing heat buildup
15%
ECM software calibration issues
Diagnostic Steps
1
Step 1: Monitor live exhaust temperature sensor data on bank 1 during regeneration cycle and compare to specifications
2
Step 2: Inspect exhaust temperature sensor wiring and connectors for damage, corrosion, or resistance issues
3
Step 3: Check fuel injector balance rates and operation, particularly post-injection timing and quantity
4
Step 4: Measure backpressure across DPF to verify no excessive restriction
5
Step 5: Verify ECM software is current version and check for technical service bulletins
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
The exhaust temperature on bank 1 has exceeded the safe threshold for diesel particulate filter (DPF) regeneration. This prevents the regeneration cycle from completing properly and can lead to DPF damage or inefficient operation.
The most common cause of P244D (Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1) is: Faulty exhaust temperature sensor providing incorrect readings
Typical repair costs for P244D range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter limp mode. Extended driving with this condition can cause DPF failure or engine damage from excessive heat.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P244D to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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