B413 B413 engine brake solenoid cyl 3: symptoms, fault codes and OEM cross references.
Cylinder 3 MX engine brake solenoid group. Intended for B413, P3421, P3423 and P3424 searches plus diagnosis of intermittent retarder complaints.
What drivers and mechanics usually notice.
These are practical, workshop-style symptom phrases written for search and support conversations. They are not a substitute for live diagnostic data.
Engine brake force markedly reduced
Engine brake cuts in and out on long downhill runs
DAVIE actuation test on cylinder 3 fails
Warning comes after repeated brake-switch use
No drivability issue until engine brake is used
Why B413 usually fails
- Open circuit on ECU output or short to ground/supply.
- Cylinder 3 solenoid coil failure after heat soak.
- Oil contamination or varnish causes plunger sticking.
- Harness fault at rocker-cover or ECU output.
Before replacing the part
- Separate engine-brake-only faults from injector/pump faults by reproducing the complaint on overrun.
- Harness continuity and oil contamination checks are essential before replacement.
P-codes reported with B413.
| Code | Lookup hint | Related symptom area |
|---|---|---|
| P3421 | Cylinder 3 engine-brake solenoid control circuit/open report | Engine brake force markedly reduced |
| P3422 | Cylinder 3 engine-brake solenoid performance report | Engine brake force markedly reduced |
| P3423 | Cylinder 3 engine-brake solenoid short-to-ground report | Engine brake force markedly reduced |
| P3424 | Cylinder 3 engine-brake solenoid electrical report | Engine brake force markedly reduced |
All numbers grouped under the canonical B413 page.
Keeping every duplicate and replacement number visible on the same canonical page helps exact OEM searches without creating hundreds of duplicated pages.
Truck, engine and year ranges from the reports.
| Truck model | Engine | Years | HP |
|---|---|---|---|
| XF 105 | PACCAR MX Euro 3/4/5 | 2005-2013 | 360-510 |
| XF 106 | MX-11 / MX-13 Euro 6 | 2013-2023 | 320-530 |
| CF 85 | PACCAR MX Euro 4/5/6 | 2005-2022 | 340-530 |
| CF 480 / CF 530 | MX-13 Euro 6 | 2017-2023 | 480-530 |
Fitment is structured from user-provided reports and must be verified by VIN, installed connector and physical part markings before supply.
Questions about B413.
What are common failure symptoms for B413?
Common symptoms include Engine brake force markedly reduced; Engine brake cuts in and out on long downhill runs; DAVIE actuation test on cylinder 3 fails; Warning comes after repeated brake-switch use. Exact symptoms vary by truck, software level and related faults.
Which fault codes are linked with B413?
Reported fault codes include P3421, P3422, P3423, P3424.
Can I order by OEM number B413 only?
Use the OEM number as a starting point, then confirm by VIN, engine type, installed connector and part photos because some reports contain duplicate or conflicting OEM references.
More fuel / brake / bypass valve lookups
B368 bypass valve
Reduced motor power and lazy spool-up · Truck smokes more on hard acceleration
B131 pump unit valve cyl 1
Engine misfire on cylinder 1 · Rough idle and vibration
B132 pump unit valve cyl 2
Cylinder 2 misfire and vibration at idle · Torque contribution from cylinder 2 too low
Ready for a quote?
Reply by email or WhatsApp. No deposit, no obligation.
Direct references from fleet operators in your country — available on request.