AutoCodes – Chevrolet – P1407 2018 Chevrolet Silverado

P1407 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Control Circuit Shorted

Quick Answer

The Engine Control Module (ECM) supplies the Exhaust Gas Recirculation (EGR) valve with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and a signal circuit. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve circuit poor electrical connection. 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: P1407 2018 Chevrolet Silverado indicates Exhaust Gas Recirculation Control Circuit Shorted.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve circuit poor electrical connection.
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.

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Code Popularity 316

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 Jun 19, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1407 2018 Chevrolet Silverado Description

The Engine Control Module (ECM) supplies the Exhaust Gas Recirculation (EGR) valve with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and a signal circuit. The EGR position sensor provides a signal voltage that changes relative to the EGR position. The EGR position sensor information is transmitted between the EGR valve and the ECM on the signal circuit. The Mass Air Flow (MAF) sensor signal is used by the ECM to detect the proper amount of EGR flow. The ECM will close the EGR valve, then open the EGR valve to 100%. The ECM will then calculate the MAF difference and determine if the proper EGR flow has been detected. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short circuit between the open and close terminals of the EGR motor for greater than 2.5 s.

OBDII Code P1407 2018 Chevrolet Silverado - Exhaust Gas Recirculation Control Circuit Shorted - AutoCodes.com — P1407 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Control Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P1407 2018 Chevrolet Silverado?

Faulty Exhaust Gas Recirculation (EGR) Valve
Exhaust Gas Recirculation Valve harness is open or shorted
Exhaust Gas Recirculation Valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1407 2018 Chevrolet Silverado?

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 P1407 2018 Chevrolet Silverado 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 P1407 2018 Chevrolet Silverado code?

Need more information on how to fix the P1407 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1407 2018 Chevrolet Silverado 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.

Frequently Asked Questions about P1407 2018 Chevrolet Silverado Code

1. What does the OBDII code P1407 mean for a 2018 Chevrolet Silverado?

The P1407 code indicates an issue with the Exhaust Gas Recirculation (EGR) Control Circuit, specifically a shorted circuit.

2. What are the common symptoms of code P1407 in a 2018 Chevrolet Silverado?

Symptoms may include the check engine light turning on, poor engine performance, rough idling, reduced fuel efficiency, or increased emissions.

3. What causes the P1407 code in a 2018 Chevrolet Silverado?

Common causes include a short in the EGR control circuit wiring, a faulty EGR valve, a malfunctioning EGR control solenoid, or corroded electrical connections.

4. Can I still drive my 2018 Chevrolet Silverado with a P1407 code?

While the vehicle may still be drivable, it is not recommended, as the issue can cause poor performance and increased emissions, potentially leading to further engine damage if left unresolved.

5. How do I diagnose the P1407 code in my 2018 Chevrolet Silverado?

Start by inspecting the EGR control circuit wiring and connectors for damage or corrosion, then test the EGR valve and solenoid for proper function using a multimeter or scan tool.

6. How is the P1407 code typically fixed in a 2018 Chevrolet Silverado?

Repairs may involve replacing damaged wiring, cleaning or replacing the EGR valve, repairing or replacing the EGR control solenoid, or addressing any corroded connectors.

7. How much does it cost to fix the P1407 code on a 2018 Chevrolet Silverado?

Repair costs can vary but typically range from $150 to $500, depending on whether the issue is with the wiring, the EGR valve, or the solenoid.

8. Can a P1407 code cause my 2018 Chevrolet Silverado to fail an emissions test?

Yes, a P1407 code can cause increased emissions, which may result in your vehicle failing an emissions test.

9. Is a faulty EGR valve the only cause of the P1407 code in a 2018 Chevrolet Silverado?

No, other potential causes include issues with the EGR control solenoid, shorted or damaged wiring, or corroded electrical connections.

10. Can I fix the P1407 code on my 2018 Chevrolet Silverado myself?

If you have basic automotive repair skills and tools, you may be able to fix issues like damaged wiring or a faulty EGR valve. For complex electrical diagnostics, professional assistance is recommended.