SIMTEC 56.1 F2: TROUBLE CODE TABLE
| Trouble Code | Information Sensor |
|---|---|
| Cause of Fault | Remedy in |
F0: DATA LIST
| No. | Trouble Code Storage when... |
74
| MASS AIR FLOW SENSOR VOLTAGE HIGH |
|---|
| 09 |
| · Engine speed greater than 672 rpm |
· Mass air flow meter signal is greater than 505 kg/h
(short circuit to voltage)
· Conditions must be fulfilled for at least 3 s
Replacement values:
· Trouble codes 21 and 22 not recognized:
The control unit calculates with an air mass calculated internally from the engine speed and throttle valve angle
· Trouble code 21 or 22 recognized:
The control unit calculates with an air mass resulting from the engine speed
Effects:
· With the exception of throttle valve adaptation, all adaptation is blocked
· Controlled canister purge valve regulation is blocked
If trouble code 21 or 22 was recognized:
· Oxygen sensor regulation is blocked
Note:
In case of a fault, the system immmediately switches to emergency operation