Diagnostic trouble code (DTC) information ECM-1300

Condition

Fig 1: Identifying Mass Air Flow (MAF) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

If the signal from the mass air flow sensor deviates in relation to the calculated air mass, the diagnostic trouble code is generated in the engine control module (ECM). Calculated air mass is based on throttle position and engine speed.

Substitute Value

initial boost pressure
rear heated oxygen sensor (HO2S) control shut off
misfire diagnosis shut off

Possible Source

Flow too high:

short-circuit to supply voltage in the signal cable
open-circuit in the ground lead
defective sensor

Flow too low:

air leakage
contact resistance
Contaminated throttle body (TB).
short-circuit to ground in the signal cable
open-circuit in signal cable
open-circuit in power supply cable
defective sensor

Fault symptom[s]

poor performance
Uneven idle