Что означает ошибка
This DTC indicates Intake Manifold 1 Temperature - Data valid but above normal operational range - Most Severe Level. It belongs to the air path, EGR and turbocharging system group and is classified as parameter above the expected operating range. Reference: code 155, SPN 105, FMI 0.
Вероятные причины
- Boost/air leak in intake or charge-air system Sticking EGR valve or turbo actuator/geometry Restricted air filter or intake path Faulty MAF/MAP/IAT sensor data Damaged vacuum/pneumatic control lines Actual value may be too high Sensor bias or incorrect calibration Mechanical/control condition causing high reading
Что проверить сначала
- Confirm whether the DTC is active or stored and record freeze-frame data. Clear the DTC and repeat the operating conditions that triggered it. Inspect the related connector, pins and harness for damage, corrosion, moisture or poor pin tension. Compare the related live-data value with the expected value and with related sensors. Pressure-test the intake/charge-air system for leaks. Compare commanded and actual boost/EGR/airflow values.
Ведомая диагностика
- Read all active and stored DTCs, freeze-frame data and related live-data parameters. Clear the fault memory and reproduce the complaint under the recorded operating conditions. Visually inspect the component, connector and harness
- repair obvious damage before deeper testing. Measure power supply, ground and signal/reference voltage under load where applicable. Compare commanded versus actual values and perform actuator/service tests with OEM-level diagnostics. If wiring, power supply and related components test good but the DTC returns, follow the OEM pinpoint test for module/component replacement or software update.
Сервисное примечание
Use OEM service information and wiring diagrams for the exact model, ECU variant and software level. After repair, clear DTCs, perform required adaptations/resets and confirm the fault does not return during a road or service test.