P0403

(P0403) EGR CONTROL CIRCUIT

When Monitored and Set Condition
^ When Monitored: A constant engine speed between 900 and 1700 RPM and no other EGR or MAP sensor faults.
^ Set Condition: The PCM commands the EGR valve to open. The MAP sensor value must drop by a minimum of 54 mbar (1.6 in Hg) when EGR is commanded open or a fault is set.

POSSIBLE CAUSES
EGR SOLENOID CONTROL CIRCUIT OPEN
EGR SOLENOID CONTROL CIRCUIT SHORT TO GROUND
EGR SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT OPEN
EGR SOLENOID
EGR VALVE
POWERTRAIN CONTROL MODULE

Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on.
With the DRB III, read the PCM DTCs.
Is this DTC preset?
Yes>> For complete diagnosis of this DTC, P0400
No>> Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Note: Check connectors-Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

Note: Check for any Technical Service Bulletins that may apply.

Were there any problems found?
Yes>> Repair as necessary.