SPN 102 / FMI 2
Intake Manifold (Boost) Pressure — Data Erratic
SAE J1939
turbo
SPN 102
FMI 2
What it means
Boost/MAP signal erratic — sensor or wiring.
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SPN 641 / FMI 7
VGT Turbocharger Actuator — Not Responding
turboHigh
P0234
Turbocharger Overboost Condition
turboHigh
P0299
Turbocharger Underboost Condition
turboHigh
P2262
Turbo Boost Pressure Not Detected — Mechanical
turboHigh
General reference only — always confirm against the OEM procedure for your specific engine.