Code Details
| Display code | SPN 27 FMI 9 |
|---|---|
| SPN | 27 |
| FMI | 9 |
| OEM code | None listed |
| Manufacturer | Volvo |
| System | Engine �?EGR system |
| Component | EGR valve / position sensor |
| Source address | Unknown or not applicable |
| Severity | medium |
| Review status | source backed |
| Source confidence | medium |
| Last reviewed | 2026-06-11 |
Plain-English Meaning
The Volvo D13 uses an electronically controlled EGR valve to precisely manage exhaust gas recirculation for NOx control. The engine management system (EMS) needs continuous feedback from the valve position sensor to verify whether the valve is positioned as commanded. When updates from this sensor stop arriving on schedule, the EMS cannot close the control loop for EGR flow management.
SPN 27 is Engine EGR Valve 1 Position in J1939. FMI 9 indicates the signal update rate is below the expected threshold �?messages are absent or arriving too slowly for the EMS to use for control. On the Volvo D13 with EMS2 or EMS3 control, the EGR valve is an electro-pneumatic or fully electric actuator with an integrated position sensor. The sensor provides continuous position feedback to the EMS for closed-loop EGR control. VCADS Pro can monitor the live EGR valve position and command the valve to a specified position to distinguish wiring from actuator faults.
Common Symptoms
- Check engine lamp active
- Possible increased exhaust smoke under load
- EGR-related companion codes may accompany this fault
Possible Causes
Possible causes may include the items below. The list is not a parts diagnosis.
- EGR valve harness connector corrosion or wiring damage
- EGR valve position sensor power supply or ground fault
- Internal failure of the EGR valve assembly and integrated sensor
- EMS internal communication fault in rare cases
First Checks
- Connect Volvo VCADS Pro and check active and inactive EGR-related codes
- Monitor the EGR valve position live data �?no change or erratic values indicate a sensor or wiring fault
- Inspect the EGR valve harness connector for corrosion and wiring damage near the valve where heat can degrade insulation
- Check the EGR valve power and ground circuit continuity at the connector
- If wiring and power supply are serviceable, the EGR valve assembly may need replacement
Can I Keep Driving?
With EGR position feedback lost, the EMS may reduce EGR flow or hold the valve at a fixed position. The truck is typically still driveable, but the fault should be resolved to restore proper emissions control and prevent progressive NOx-related aftertreatment issues.
Related Codes
Related Lookup Pages
Sources
- Volvo Trucks Tech Info Public Resources Volvo Trucks North America · oem · accessed 2026-06-11 · confidence medium
Source: Volvo Trucks North America, Volvo Trucks Tech Info Public Resources. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - Volvo Trucks / Mack Trucks Technical Support Volvo Trucks North America / Mack Trucks Inc. · oem · accessed 2026-06-10 · confidence medium
Source: Volvo Trucks North America / Mack Trucks Inc., Volvo Trucks / Mack Trucks Technical Support. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - SAE J1939 Standards Collection SAE International · official · accessed 2026-05-05 · confidence medium
Source: SAE International, SAE J1939 Standards Collection. This page paraphrases factual fields only and is not a substitute for the original document.
Open source
FAQ
Is the EGR valve on the Volvo D13 the same part as on the Mack MP8?
The Volvo D13 and Mack MP8 share a closely related architecture �?the MP8 is derived from the Volvo platform. EGR valve components are often interchangeable or nearly identical between the two applications. Confirm part numbers through VCADS Pro or Mack VCADS before ordering.
Can the Volvo D13 EGR valve be cleaned to restore position sensor communication for SPN 27 FMI 9?
FMI 9 indicates a communication rate issue, not a mechanical carbon buildup sticking fault. Cleaning the valve bore may not resolve a communication fault. The focus should be on the wiring, connector, and power supply at the valve assembly. If those are serviceable, the valve assembly with integrated sensor likely needs replacement.
Does VCADS Pro allow bidirectional EGR valve testing on the Volvo D13?
Yes. VCADS Pro includes service routines that command the EGR valve to open and close through its full range. This test verifies whether the actuator responds correctly and whether the position sensor reading tracks the commanded position. A valve that moves but has no matching position sensor update confirms the sensor or its wiring is at fault.