Diagnostic trouble code (DTC) information ECM-130A

Condition 

Fig 1: Identifying Intake Air Temperature (IAT) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) measures the air mass through the intake manifold using a sensor. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the sensor value deviates too much from a calculated value.

The diagnostic trouble code (DTC) can be diagnosed when:

• The engine is at operating temperature
• Engine speed (RPM) is approximately 700-5500 rpm
• Throttle angle is approximately 2-60°.

Substitute Value 

• A value calculated from engine speed (RPM) and pressure in the intake manifold is used.

Possible Source 

• Contact resistance in the connector
• Damaged fresh air intake hose
• Damaged mass air flow (MAF) sensor.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit
• Jerky operation.