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DAF fault code P3425: likely components, OEM numbers and symptoms.

Cylinder 4 engine-brake solenoid control circuit/open report. This page groups every component report connected with P3425, 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 P3425.

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 P3425

MX engine brake noticeably weaker than normal
Engine brake force drops as RPM falls
DAVIE4 brake actuator self-test fails on cylinder 4
Audible irregular cadence of engine brake on overrun
Fault appears after hot soak or long descent
OEM numbers

OEM references to check

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

B414
Why it happens

Likely root causes behind P3425

  • Solenoid coil winding failure.
  • Open or short circuit on cylinder 4 engine-brake wiring.
  • Valve plunger sticks from oil sludge or varnish.
  • ECU output or rocker-cover harness fault.
Fitment

Trucks and engines that report P3425

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 4/5/6 2005-2022
CF 430 / CF 480 / CF 530 MX Euro 6 2017-2023

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