P0403 - Exhaust Gas RECIRCULATION (EGR) Control Circuit

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

P0403 - EXHAUST GAS RECIRCULATION (EGR) CONTROL CIRCUIT

Description:	The electric exhaust gas recirculation (EEGR) system is continuously monitored to check the 4 EEGR motor coils, circuits, and the powertrain control module (PCM) for opens, shorts to voltage and ground. If a concern is detected the EEGR system is disabled and additional monitoring is suspended for the remainder of the drive until the next drive cycle.
Possible Causes:	EEGR motor windings open Connector to EEGR not seated Open circuit in the harness from the PCM to the EEGR Open circuit in the PCM Short circuit in the EEGR motor Short circuit in the harness from the PCM to the EEGR Short circuit in the PCM
Diagnostic Aids:	If an intermittent condition is suspected the most effective method of wiring concern isolation is to use the wiggle test method while measuring for shorts and open circuits.
Application		Key On Engine Off	Key On Engine Running	Continuous Memory
All		-	refer to PINPOINT TEST KD .	refer to PINPOINT TEST KD .