Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Diagnostic trouble code (DTC) EFI-122 is stored if the control module receives a signal from the intake air temperature (IAT) sensor which corresponds to a temperature lower than -48°C (low signal) or higher than +142°C (high signal) and it is interpreted as a fault.

Substitute value
- At start 20°C.
- When driving: latest correct values.
- Adaptation values not updated.

Possible source

Signal too high:
- Short-circuit to supply voltage in the signal cable
- Open-circuit in the signal cable or in the ground lead.
- Faulty intake air temperature (IAT) sensor.

Signal too low:
- Short-circuit to ground in the signal cable.
- Faulty intake air temperature (IAT) sensor.

Fault symptom[s]
- None.