Table 2, Trouble Code Table
| Trouble Code | Information Sensor |
|---|---|
| Cause of Fault | Remedy in |
F0: DATA LIST
| No. | Trouble Code Storage when | |
|---|---|---|
| 73 | MASS AIR FLOW | |
| SENSOR VOLTAGE LOW | 09 | · Engine not in operating condition: deceleration fuel cutoff and deceleration |
· Engine speed higher than 704 rpm (C 18 XE) or higher than 672 rpm (X 20 XEV)
· Mass air flow meter signal less than 5.1 kg /h
(short circuit to ground or circuit interruption)
· Above conditions must be fulfilled for at least 3.0 s
Replacement values:
Trouble codes 21 or 22 not recognized:
· The control unit calculates with an air mass calculated internally from the engine speed and throttle valve angle
Trouble codes 21 or 22 recognized:
· The control unit calculates with an air mass resulting from the engine speed
Effects:
· All adaptation except throttle valve adaptation is blocked
· The tank vent valve regulation is blocked, the tank vent valve is closed
If trouble codes 21 or 22 were recognized:
· The oxygen sensor regulation is blocked
Note:
In case of a fault, the system is immediately switched to emergency operation