Diagnostic trouble code (DTC) information ECM-1300

Condition

Fig 1: Identifying Intake Air Temperature (IAT) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) checks the signal from the mass air flow (MAF) sensor.

This diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a short-circuit to ground or supply voltage or an open-circuit in the sensor circuit.

The diagnostic trouble code (DTC) is diagnosed when the ignition is on.

Substitute Value

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

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Damaged mass air flow (MAF) sensor.

Signal too low

Short-circuit to ground in the signal cable
Open-circuit in the signal cable
Damaged mass air flow (MAF) sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.