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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 204 (Engine Controls - Self-Diagnostics - 1.8L - Ca) >> Diagnostic Tests >> DTC P0403: EGR Volume Control Valve >> DTC Confirmation Test

DTC Confirmation Test

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Ensure engine coolant temperature is less than 107°F (40°C) before performing this confirmation test. Ensure battery voltage is greater than 10 volts at idle before performing this confirmation procedure.

Malfunction is detected when an improper voltage signal is sent to ECM through the EGR valve. Possible causes are:

Connect scan tool to Data Link Connector (DLC). See Figure . Turn ignition on. Using scan tool, select DATA MONITOR. Start engine and warm to normal operating temperature. Increase engine speed to 2000 RPM 10 times. If first trip DTC is sets, perform DIAGNOSTIC PROCEDURE  . If first trip DTC is not set, problem may be intermittent. See TESTING PROCEDURE  under SELF-DIAGNOSTIC SYSTEM.

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