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DAF fault code P3407: likely components, OEM numbers and symptoms.

Cylinder 1 engine-brake solenoid short-to-ground report. This page groups every component report connected with P3407, so a mechanic can move from the error code to the relevant OEM numbers, defect symptoms and fitment checks.

A fault code alone is not a parts order. Confirm with live data, VIN, installed OEM number, connector and part photos before quoting or fitting.

Likely components

Component families linked with P3407.

The same code can appear with different root causes. Use the OEM number and symptom pattern to choose the right branch.

Defect symptoms

Symptoms reported with P3407

MX engine brake retard force reduced
Engine brake loses one stage and feels weak
DAVIE4 actuation test on brake cylinder 1 fails
Uneven engine brake noise on overrun
Engine warning lamp appears when engine brake is applied
OEM numbers

OEM references to check

Use these links when the workshop note only contains an OE number instead of the exact part family.

B411 1907284 1907285
Why it happens

Likely root causes behind P3407

  • Open circuit on ECU output or short to ground.
  • Engine brake cylinder 1 solenoid coil burn-out.
  • Valve clearance or mechanical pusher issue on the rocker shaft.
  • Varnish or oil contamination creates sticky valve movement.
Fitment

Trucks and engines that report P3407

Model Engine Years
XF 105 PACCAR MX Euro 3/4/5 2005-2013
XF 106 MX-11 / MX-13 Euro 6 2013-2023
CF 85 PACCAR MX Euro 3/4/5/6 2005-2022
CF 430 / CF 480 / CF 530 MX Euro 6 2017-2023

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