Powertrain, generic (extended)

P24A3 Particulate Filter Restriction - Soot Accumulation (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P24A3 is the bank 2 entry for a particulate filter whose soot load, estimated from differential pressure, exhaust flow and a soot model, has climbed to the point where it noticeably restricts flow and needs a regeneration. It only appears on engines with two separate filter strands, such as some V engines. Public manufacturer documentation for this exact code is missing (the NHTSA bulletin index has no hit either), so this text leans on CARB's filter-clogging requirement and on the bank 1 equivalent P2463, which Deutz lists as a high soot load warning. The stronger level for bank 2, beyond which a normal regeneration may no longer be safe, is P243F, while ash build-up is reported separately. A long motorway drive or a workshop-initiated regeneration often clears it; repeated returns point to the cause behind the soot.

Likely causes

Mostly short trips so passive and active regeneration cannot finish
Excess soot from injectors, EGR or boost problems
Differential pressure sensor or hoses on bank 2 giving a false high reading

Symptoms

  • Particulate filter or engine warning lamp
  • Reduced power or slow response
  • Higher fuel consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–800
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dpf b2

Related codes

P2463P243FP243E

References: law.cornell.edu, serdia.deutz.com.