P24B1
System
Powertrain (Diesel Emissions)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Particulate Filter Pressure Sensor B Circuit

Understand P24B1, common causes, and the right SEAFLO pump to diagnose it.

Secondary DPF differential pressure sensor circuit fault on dual-sensor diesel aftertreatment systems.

Common symptoms

  • DPF warning
  • Limp mode
  • P2463 may follow

Typical causes

  • Failed pressure sensor B
  • Soot plugged sensor tube
  • Wiring at DPF
  • Internal DPF structural fault

What scanner do you need?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Frequently asked questions

Can I diagnose P24B1 with a basic code reader?
P24B1 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P24B1?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.