SPN 27 FMI 2
EGR Valve Position — Data erratic, intermittent, or incorrect.
The signal jumps around, drops in and out, or disagrees with other information the controller has.
What the SPN covers: Tracks how far open the exhaust gas recirculation (EGR) valve is compared with where the engine computer asked it to be. More on SPN 27.
What FMI 2 usually points to: Loose or corroded connectors, chafed wiring, a failing sensor, or two redundant sensors that do not agree. More on FMI 2.
Severity
MEDIUM — fix soon
Usually drivable short-term, but expect a derate and more soot. Get it checked soon.
Likely causes
- Carbon-stuck or sticking EGR valve
- Failed EGR actuator or position sensor
- Wiring or connector damage near the hot side of the engine
- Low supply voltage to the actuator
Checks & fixes (easiest first)
- Inspect EGR connector and harness for heat damage
- Command the EGR valve with a scan tool and watch actual vs. commanded position
- Remove and inspect for carbon if it is slow or stuck
- Check related EGR temperature and DPF codes
FAQ
What does SPN 27 FMI 2 mean?
EGR Valve Position — data erratic, intermittent, or incorrect. The signal jumps around, drops in and out, or disagrees with other information the controller has.
Is SPN 27 FMI 2 serious?
Usually drivable short-term, but expect a derate and more soot. Get it checked soon.
What should I check first for SPN 27 FMI 2?
Inspect EGR connector and harness for heat damage; Command the EGR valve with a scan tool and watch actual vs. commanded position; Remove and inspect for carbon if it is slow or stuck.