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.





For a complete Powertrain Control Module Circuit Diagram, Schematics and Diagrams.

Diagnostic Test

1. CHECK FOR CURRENT DTC
Turn the ignition on.
With the scan tool, read PCM DTCs.
Is this DTC present?

Yes

- For complete diagnosis of this DTC, refer to (P0400) EGR SYSTEM PERFORMANCE. 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.