DTC P0404 Acura
Exhaust Gas Recirculation (EGR) Control Circuit Range Performance Problem
Exhaust Gas Recirculation (EGR) Control Circuit Range Performance Problem
Description
Vehicle at a speed between 15-75 mph, actual valve lift command at 0.012 in. (0.3 mm). The execution time is once per driving cycle and the duration time is 5 seconds or more. The difference between the command value of the amount of EGR valve lift in the PCM and the actual amount of valve lift is 0.041 in. (1.020 mm) or more for at least 5 seconds. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Carbon build-up on the EGR valve
Faulty EGR valve
Poor connections or loose terminals at the EGR valve and the PCM
Short or Short between the PCM and the EGR valve
Open in the wire between the EGR valve and ground
PCM may need to be updated with the latest software
Video Guide
Diagnostic Info
- DTC Code: P0404
- Brand: Acura