Diagnostic trouble code (DTC) information ECM-1320

Condition 

Fig 1: Identifying Boost Pressure Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) checks the signal for the intake air temperature.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal does not follow a certain characteristic over a period of time.

The diagnostic trouble code (DTC) can be diagnosed under specific driving conditions.

Substitute Value 

• Predefined value for intake air temperature
• Three-way catalytic converter (TWC) preheating and idle air trim diagnostics are disabled.

Possible Source 

• Contact resistance or oxidation in the intake air temperature (IAT) sensor terminals
• Damaged intake air temperature (IAT) sensor.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit
• Poor performance.