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Symptom: P0400-EGR SHORT CIRCUIT When Monitored and Set Condition: P0400-EGR SHORT CIRCUIT When Monitored: With the ignition on. Set Condition: The ECM detects excessive current draw on the electric vacuum modula- tor control circuit. POSSIBLE CAUSES INTERMITTENT CONDITION EGR SOLENOID EGR SOLENOID CONTROL SHORTED TO VOLTAGE ENGINE CONTROL MODULE - INTERNAL ENGINE CONTROL MODULE - INTERNAL SHORT TO VOLTAGE TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → No → 2 Turn the ignition off. All Yes → Replace the EGR Solenoid. No → 3 Turn the ignition off. All Yes → Replace and program the Engine Control Module in accordance No → 63 DRIVEABILITY - DIESEL |