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P0400 Diagnostic Trouble Code Discussion for June 2012

Exhaust Gas Recirculation System Flow Malfunction


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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1998 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBJF65F1W
P0400: EGR Malfunction. Good morning, I'm trying to find what ground signal or what is normal for the rear heater circuit on this vehicle. I have my voltage going to O2's, and the computer is grounding the O2's for 100ms, 1 time every second. For the 100ms the rear heaters are on the...
June 27, 2012
1998 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBJF65F1W
P0400: EGR Malfunction. Good morning, I'm trying to find what ground signal or what is normal for the rear heater circuit on this vehicle. I have my voltage going to O2's, and the computer is grounding the O2's for 100ms, 1 time every second. For the 100ms the rear heaters are on the...
June 27, 2012