DTC P0402 - EGR A Flow Excessive Detected
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 2019 Lincoln Navigator, 2019 Lincoln Nautilus, 2019 Lincoln MKZ, 2019 Lincoln MKT, and 2019 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
DTC DESCRIPTION P0402 - EGR A FLOW EXCESSIVE DETECTED
| Description: The exhaust gas recirculation (EGR) system is monitored for undesired EGR flow during idle. The EGR monitor looks at the differential pressure feedback EGR (DPFE) signal at idle and compares it to the stored signal measured during ignition ON, engine OFF. This DTC sets when the signal at idle is greater than at ignition ON, engine OFF by a calibrated amount. | |||
Possible Causes:
|
|||
| Diagnostic Aids: A DPFEGR PID reading that is greater at idle than during KOEO by 0.5 volt or a rough engine idle may indicate a concern. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST HE . | ||