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Detroit Diesel SPN 102 FMI 18 indicates that intake manifold pressure is above the expected threshold. This fault is commonly associated with turbocharger control issues, boost leaks, or sensor malfunctions.
Symptoms
- Check engine light illuminated
- Reduced engine performance
- Excessive boost pressure
- Whistling or unusual turbo noise
Cause
This code may be triggered by a faulty turbo actuator, stuck variable geometry turbo (VGT), restricted intake system, charge air cooler leaks, or inaccurate manifold pressure sensor readings.
Can You Keep Driving?
Driving may be possible temporarily, but excessive boost pressure can lead to engine stress or additional fault codes if not corrected.
Recommended Action
Inspect turbocharger components, charge air cooler connections, and manifold pressure sensors. Perform diagnostic testing to confirm proper turbo operation.
SPN 102 FMI 18 indicates that intake manifold pressure is higher than expected, often related to turbocharger or boost control issues.
Common causes include a sticking turbo actuator, variable geometry turbo malfunction, charge air leaks, restricted intake system, or faulty pressure sensor readings.
Driving may be possible temporarily, but excessive boost pressure can place additional stress on engine components.
In some cases, persistent boost pressure faults can trigger protective power reduction to prevent engine damage.
Inspect turbocharger components, check charge air cooler connections, verify sensor accuracy, and test the turbo actuator for proper movement.
Related codes
Need Immediate Help With This Fault Code?
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Use 4RoadService to locate mobile truck repair, dealer diagnostics, or emergency roadside assistance near your location.
Important Notice
The information provided above is for general informational purposes only and should not replace official OEM service procedures. Always consult the manufacturer’s service manual or a qualified diesel technician before performing repairs. Operating a vehicle with active fault codes may result in further damage.