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Troubleshooting SPN 2659 FMI 18 on Volvo VNL
I'm working with a Volvo VNL that's displaying a fault code: SPN 2659 FMI 18, which corresponds to a low EGR mass flow rate. So far, the only symptom reported is the presence of this fault code. Given the implications of EGR system issues on performance and potential downtime, I'm curious about what might connect this symptom to the underlying problem. What are some first checks a qualified shop should consider to get to the root of this issue? Should we start by confirming the complete code and engine configuration as suggested in Volvo's service info?
Verified source: MC-10201738-0001 — SPN 2659 FMI 18