Malfunction Threshold
The ratio of the current EGR flow to the normal EGR flow is 15 % or less for at least 3.0 seconds.
The ratio is derived from the actual and estimated MAP values before and after the EGR valve was opened.
The estimated MAP difference value is shown in the table.
| Engine speed | Barometric pressure | |
| 52 kPa (15.4 inHg, 390 mmHg) | 101 kPa (29.9 inHg, 760 mmHg) | |
| 1,200 rpm | 7 kPa (2.2 inHg, 55 mmHg) | 12 kPa (3.4 inHg, 87 mmHg) |
| 2,100 rpm | 4 kPa (1.3 inHg, 33 mmHg) | 7 kPa (2.0 inHg, 50 mmHg) |