Typical Malfunction Thresholds
P0400
| Manifold pressure change* | Less than 1.8125 kPa [0.3 psi] (at engine speed 1400 rpm) |
P0401
| Manifold pressure change* | Less than 1.8125 kPa [0.3 psi] (at engine speed 1400 rpm) |
| Manifold pressure | Less than 26.28 kPa [3.81 psi] |
P0402
| Manifold pressure change* | Less than 1.8125 kPa [0.3 psi] (at engine speed 1400 rpm) |
| Manifold pressure | 26.28 kPa [3.81 psi] or more |
| *: Calculated by EGR valve open and close | - |