P0403
Medium SeverityEGR Control Circuit
Emissions System
What Does P0403 Mean?
The EGR valve control solenoid or motor has a circuit fault.
Common Fix
Replace EGR valve or solenoid
Estimated Cost (DIY)
$30 - $200
Symptoms
- ⚠️Check engine light
- ⚠️EGR not functioning
- ⚠️Possible rough idle
Related Symptoms
Common Causes
How to Diagnose P0403
- 1Check EGR connector
- 2Test solenoid/motor
- 3Check wiring
OEM Diagnostic Flowchart
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Read live data and freeze frame for P0403 to pinpoint the cause before buying parts.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0403.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Savana 2500 V8-6.6L DSL Turbo Service Manual | Operation CHARM Operation CHARM : Ca...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Savana 3500 V8-6.6L DSL Turbo Service Manual | Operation CHARM Operation CHARM : Ca...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Savana 4500 V8-6.6L DSL Turbo Service Manual | Operation CHARM Operation CHARM : Ca...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Chevy Truck Express 2500 V8-6.6L DSL Turbo Service Manual | Operation CHARM Operation CHARM :...
Related Symptoms
Browse →A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.
Rough idle often traces back to ignition, air metering, vacuum leaks, or timing-related faults before it becomes a full misfire complaint.
Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0403.
Open the exact vehicle hub for a repair workflow commonly associated with P0403.
Open the exact vehicle hub for a repair workflow commonly associated with P0403.
Open the exact vehicle hub for a repair workflow commonly associated with P0403.
Open the exact vehicle hub for a repair workflow commonly associated with P0403.
Open the exact vehicle hub for a repair workflow commonly associated with P0403.
Exact Repair Workflows
Browse →Open the exact repair flow most commonly associated with P0403 on this vehicle.
Open the exact repair flow most commonly associated with P0403 on this vehicle.
Open the exact repair flow most commonly associated with P0403 on this vehicle.
Open the exact repair flow most commonly associated with P0403 on this vehicle.
Open the exact repair flow most commonly associated with P0403 on this vehicle.
Open the exact repair flow most commonly associated with P0403 on this vehicle.
Related Codes
The EGR system flow is not within expected parameters.
The EGR is not flowing enough exhaust gas. Usually carbon buildup blocking the passages.
Too much exhaust gas is being recirculated, causing rough idle and stalling.
Frequently Asked Questions
- Is the EGR solenoid part of the valve?
- On modern vehicles, the solenoid is usually integrated into the EGR valve assembly.
- How much is an EGR valve?
- EGR valves cost $30-$200 depending on the vehicle. Electronic EGR valves cost more than vacuum-operated ones.
Related Repair Guides
If your vehicle has triggered P0403, these DIY repair guides may help: