Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information EFI-444

Condition




If the engine control module (ECM) senses that the DC signal from the accelerometer has changed its mean setting (2.5 V) to more than 3.5 V or less than 1.5 V, diagnostic trouble code (DTC) EFI-444 is stored.

Substitute value
- none.

Possible source

Signal too high:
- short-circuit to supply voltage in signal cable
- open-circuit in signal cable, ground lead or power cable
- short-circuit to ground or supply voltage in power cable
- contact resistance in terminals
- short-circuit to ground in air conditioning (A/C) pressure sensor
- short-circuit to ground in fuel tank pressure sensor power cable
- short-circuit to ground in atmospheric pressure sensor power cable
- defective air conditioning (A/C) pressure sensor
- defective atmospheric pressure sensor
- defective fuel tank pressure sensor.
- defective accelerometer

Signal too low:
- short-circuit to ground in signal cable
- defective accelerometer

Fault symptom[s]
- can store misfire diagnostic trouble codes (DTCs) when travelling on an uneven road.