2104977 BPV valve 2104977: symptoms, fault codes and OEM cross references.
MX-13 Euro 6 BPV valve group from the repeated reports. Searchers usually need to match an OE number and understand weak engine-brake, chuffing exhaust and derate symptoms.
OEM report needs verification
This number appears in duplicated or conflicting report groups. Confirm by VIN, engine type, installed connector and photos before quoting or fitting.
- 2104977 and 2128867 appear in both EGR and BPV report groups.
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 suddenly weak or completely dead on descents
Slow turbo spool and flat take-off after throttle lift
Harsh barking or chuffing from the exhaust when braking with engine brake
Intermittent derate with heavy trailer and warm engine
Fuel economy worsens on stop-start or hilly routes
Why 2104977 usually fails
- Butterfly shaft carbon-binds in the exhaust stream.
- Actuator gearbox strips or develops position-sensor drift.
- Exhaust-pressure control becomes erratic once the flap starts sticking.
- Thermal cycling creates intermittent faults when the valve is hot.
Before replacing the part
- Inspect valve travel after a hot road test, not only on a cold bench.
- Check exhaust pressure sensor readings because BPV faults can create pressure implausibility codes.
- OEM 2104977 and 2128867 also appear in EGR report groups, so show possible matches in the OEM lookup.
P-codes reported with 2104977.
| Code | Lookup hint | Related symptom area |
|---|---|---|
| P0027 | Exhaust valve / back pressure control range issue | Engine brake suddenly weak or completely dead on descents |
| P006B | Pressure correlation issue, often checked with BPV/exhaust pressure faults | Engine brake suddenly weak or completely dead on descents |
| P047C | Exhaust pressure sensor / pressure-control signal low | Engine brake suddenly weak or completely dead on descents |
| P047D | Exhaust pressure sensor / pressure-control signal high | Engine brake suddenly weak or completely dead on descents |
| P101E | BPV actuator cannot reach commanded position in report data | Engine brake suddenly weak or completely dead on descents |
| P1021 | BPV actuator tracking or control issue in report data | Engine brake suddenly weak or completely dead on descents |
| P1026 | BPV actuator tracking or control issue in report data | Engine brake suddenly weak or completely dead on descents |
Truck, engine and year ranges from the reports.
| Truck model | Engine | Years | HP |
|---|---|---|---|
| XF 106 | MX-13 Euro 6 | 2013-2023 | 460-530 |
Fitment is structured from user-provided reports and must be verified by VIN, installed connector and physical part markings before supply.
Questions about 2104977.
What are common failure symptoms for 2104977?
Common symptoms include Engine brake suddenly weak or completely dead on descents; Slow turbo spool and flat take-off after throttle lift; Harsh barking or chuffing from the exhaust when braking with engine brake; Intermittent derate with heavy trailer and warm engine. Exact symptoms vary by truck, software level and related faults.
Which fault codes are linked with 2104977?
Reported fault codes include P0027, P006B, P047C, P047D, P101E, P1021, P1026.
Can I order by OEM number 2104977 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.
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