AutoCodes – GMC – P1403 GMC

P1403 GMC Code - Exhaust Gas Recirculation System Valve 1

Quick Answer

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation (EGR) valve pintle position input to ensure that the valve responds properly to commands from the PCM. Common causes include Carbon blockage of the pintle, Faulty Exhaust Gas Recirculation (EGR) valve. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P1403 GMC indicates Exhaust Gas Recirculation System Valve 1.
Common causes: Common causes include Carbon blockage of the pintle, Faulty Exhaust Gas Recirculation (EGR) valve.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,793

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1403 GMC Description

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation (EGR) valve pintle position input to ensure that the valve responds properly to commands from the PCM. When the ignition switch is turned ON, the PCM learns the EGR learned minimum position. The PCM compares the EGR learned minimum position to the EGR position sensor when the EGR valve is commanded closed.

OBDII Code P1403 GMC - Exhaust Gas Recirculation System Valve 1 - AutoCodes.com — P1403 GMC Code - Exhaust Gas Recirculation System Valve 1

What does this mean?

What are the Possible Causes of the DTC P1403 GMC?

Carbon blockage of the pintle
Faulty Exhaust Gas Recirculation (EGR) valve

How to Fix the DTC P1403 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1403 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1403 GMC code?

Need more information on how to fix the P1403 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1403 GMC code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.