Powertrain, generic (extended)

P260E Particulate Filter Regeneration Lamp Control Circuit

Check engine lightUsually off
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Diesel machines often have a separate dashboard lamp that tells the operator a particulate filter regeneration is needed or running. P260E covers the circuit that switches this lamp. Deutz documents it for its EMR5/MD1 engine controllers: fault type 11 (J1939 SPN 3697, FMI 4) means the lamp output reads below normal or is shorted to ground, type 12 (FMI 3) means it is too high or shorted to the supply. Deutz engines go into tractors, construction and other off-road equipment, so the code is mostly met there. For on-road heavy-duty engines CARB section 1971.1 requires electrical checks of such output components. A failed lamp output does not affect the filter itself, but the operator may miss a request for a parked regeneration, letting soot load build up until power is reduced.

Likely causes

Lamp wire shorted to ground or to supply
Lamp or bulb holder open, or lamp not fitted on this machine
Corroded connector at dashboard or engine controller

Symptoms

  • Regeneration lamp dark or permanently lit
  • Missed regeneration requests leading to high soot load
  • Later power reduction by the engine controller

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–300
Time0.3–1.5 h

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

Parts involved

dpf regen lampinstrument clusterwiring harness

Related codes

P2002P2458P2459

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