Detroit DD13 EPA07 (2007-09) Fault Code: SPN 2659 FMI 1 (MCM) Exhaust Gas Recirculation Flow Target Error (Low Flow)

Posted by PerDiezel Solutions on March 8, 2026

NOTE: If codes 441-xx, 1636-xx, 2791-xx, 3563-xx, or 2630-xx are active, fix those first.

PROBABLE CAUSES:
1. Inspect the EGR and exhaust system for evidence of leaking.
2. Delta P sensor.
3. Delta P sensor ports.
4. Delta P sensor harness/connector.
5. Air inlet manifold pressure sensor.
6. Air inlet manifold pressure sensor connector/harness.
7. Remove the EGR cooler hot pipe, EGR crossover pipe, and the delivery pipe for excessive build up or blockage.
8. EGR valve failure.

WARNING!