2104977 MX-11 Euro 6 EGR valve 2104977: symptoms, fault codes and OEM cross references.
MX-11 EGR valve report group using OEM 2104977 and related numbers. These same numbers also appear in a BPV report group, so exact OEM lookup should show both possible matches and request VIN/photo verification.
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.
- Conflict: 2104977, 2128867, 2187597, 2256380 and 2426255 also appear as BPV valve numbers in another supplied report.
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.
Limp mode after cold start
EGR not reaching commanded position
DPF differential pressure high
EGR sweep failure on key-on
EGR valve position implausible
Engine protection mode active
Why 2104977 usually fails
- Carbon ingress from the EGR cooler outlet restricts the valve and seat.
- Stepper motor or gearbox failure after repeated high-temperature modulation.
- Gear backlash and position-sensor drift create implausible position reports.
- Soot loading is accelerated by urban use, long idle time and repeated regeneration cycles.
Before replacing the part
- Confirm whether the installed part is an EGR valve or BPV before quoting; the same numbers occur in both report sets.
- Run key-on EGR sweep and inspect for soot-packed shaft movement.
- Check DPF differential pressure and EGR cooler contamination when the valve repeatedly sticks.
P-codes reported with 2104977.
| Code | Lookup hint | Related symptom area |
|---|---|---|
| P0404 | EGR position or range/performance issue | Limp mode after cold start |
| P1489 | EGR actuation / position report code | Limp mode after cold start |
| P1490 | EGR actuation / position report code | Limp mode after cold start |
| P1493 | EGR position sensor report code | Limp mode after cold start |
| P1494 | EGR position or actuator report code | Limp mode after cold start |
| P1495 | EGR position or actuator report code | Limp mode after cold start |
| P1496 | Engine protection / EGR or BPV control report code | Limp mode after cold start |
Truck, engine and year ranges from the reports.
| Truck model | Engine | Years | HP |
|---|---|---|---|
| XF 106 | MX-11 Euro 6 | 2013-2021 | 320-440 |
| CF 85 | MX-11 Euro 6 | 2013-2021 | 320-440 |
| CF 430 | MX-11 Euro 6 | 2017-2021 | 430 |
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 Limp mode after cold start; EGR not reaching commanded position; DPF differential pressure high; EGR sweep failure on key-on. Exact symptoms vary by truck, software level and related faults.
Which fault codes are linked with 2104977?
Reported fault codes include P0404, P1489, P1490, P1493, P1494, P1495, P1496.
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.
More egr valve lookups
MX-13 Euro 6 EGR valve
Power derate or limp mode · EGR valve stuck open or stuck closed in diagnostic software
MX-11 Euro 6 EGR valve
Power loss under load · Black smoke and EGR estimated rate too high
Pierburg EGR valve 2123995
Coolant loss without external leak · EGR commanded versus actual mismatch
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