Diagnostic trouble code (DTC) information ECM-1400

Condition

Fig 1: Identifying Manifold Absolute Pressure (MAP) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) measures the pressure in the intake manifold using a 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 from the mass air flow (MAF) sensor is used.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Open-circuit in the signal cable
Damaged manifold absolute pressure (MAP) sensor.

Signal too low

Short-circuit to ground in the signal cable
Damaged manifold absolute pressure (MAP) sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.