What Does P245F Mean?
The DPF pressure sensor B signal is outside the expected range during operation. The sensor reading does not correlate with actual engine conditions or sensor A readings.
Common Causes
35%
Clogged or restricted pressure sensing hoses
30%
Faulty DPF pressure sensor B giving incorrect readings
20%
Carbon buildup in pressure tap points
10%
Intermittent wiring or connector issues
5%
Excessive DPF clogging affecting pressure readings
Diagnostic Steps
1
Step 1: Compare DPF pressure sensor A and B readings in live data at idle and various RPMs
2
Step 2: Inspect pressure sensing hoses for kinks, blockages, or carbon buildup
3
Step 3: Remove and clean pressure tap points at DPF if accessible
4
Step 4: Verify sensor operation by applying known vacuum/pressure if equipped with appropriate tools
5
Step 5: Check DPF back pressure manually if readings suggest excessive restriction
Estimated Repair Cost
$150 - $550
Parts + labor, varies by vehicle and location
The DPF pressure sensor B signal is outside the expected range during operation. The sensor reading does not correlate with actual engine conditions or sensor A readings.
The most common cause of P245F (Diesel Particulate Filter Pressure Sensor "B" Circuit Range/Performance) is: Clogged or restricted pressure sensing hoses
Typical repair costs for P245F range from $150 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe for limited driving but DPF regeneration cycles may not initiate properly. Continued operation could lead to severe DPF clogging and engine power reduction.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P245F to identify the root cause.
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Quick Info
Category
Powertrain
System
Diesel Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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