Diagnostic Trouble Code (DTC) Information

ECM-1300 MASS AIR FLOW (MAF) SENSOR
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
The diagnostic trouble code (DTC) ECM-1300 is stored if the mass air flow (MAF) sensor signal is not correct in relation to the calculated air mass. Calculated air mass is based on throttle position and engine speed.

Condition
- 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
- short-circuit to ground in the signal cable
- open-circuit in signal cable
- open-circuit in power supply cable
- defective sensor

Condition
- poor performance