Cylinder 4 engine-brake solenoid control circuit/open report. This page groups every component report connected with P3429, 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.
The same code can appear with different root causes. Use the OEM number and symptom pattern to choose the right branch.
Cylinder 4 MX engine brake solenoid group for B414 and P3425/P3427/P3428/P3429/P3431/P3432 searches.
Use these links when the workshop note only contains an OE number instead of the exact part family.
| 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 |
Send the OE label, VIN, fault code and photos. We will help identify the part and confirm the appropriate repair route.
Diagnostic index entries are not a promise that TruckValves services every listed component.