AutoCodes – Chevrolet – P042E 2018 Chevrolet Silverado

P042E 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Closed Position Performance

Quick Answer

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) position sensor to determine the position of the EGR valve. 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 High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P042E 2018 Chevrolet Silverado indicates Exhaust Gas Recirculation Closed Position Performance.
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: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 428

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P042E 2018 Chevrolet Silverado Description

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) position sensor to determine the position of the EGR valve. The ECM sends a reference voltage through the 5 V reference circuit to the EGR position sensor. The ECM provides a voltage return path for the sensor through the low reference circuit. A signal based on the EGR valve position is sent from the EGR sensor to the ECM. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the desired position and the actual position of the EGR valve is greater than a calibrated threshold.

OBDII Code P042E 2018 Chevrolet Silverado - Exhaust Gas Recirculation Closed Position Performance - AutoCodes.com — P042E 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Closed Position Performance

What does this mean?

What are the Possible Causes of the DTC P042E 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 P042E 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 P042E 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 P042E 2018 Chevrolet Silverado code?

Need more information on how to fix the P042E 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P042E 2018 Chevrolet Silverado Code

What does OBDII code P042E mean for a 2018 Chevrolet Silverado?

OBDII code P042E indicates that the vehicle's engine control module (ECM) has detected a performance issue with the exhaust gas recirculation (EGR) system, specifically that the EGR valve is not closing properly.

What are the common symptoms of a P042E code?

Common symptoms include reduced engine performance, increased fuel consumption, rough idling, and the check engine light being illuminated.

What could cause the P042E code on my Silverado?

Possible causes include a faulty EGR valve, a clogged EGR passage, vacuum leaks, or issues with the ECM software.

How can I diagnose a P042E code?

To diagnose a P042E code, you can start by using an OBDII scanner to confirm the code, inspect the EGR valve and its connections, check for any vacuum leaks, and perform tests to ensure the EGR system is functioning correctly.

What repairs are typically needed to fix a P042E code?

Repairs may involve cleaning or replacing the EGR valve, repairing any vacuum leaks, cleaning the EGR passage, or updating the ECM software if necessary.

Can I drive my Silverado with a P042E code?

While the vehicle may still be operational, it is not advisable to drive it for an extended period, as it can lead to decreased performance and increased emissions.

Will clearing the P042E code reset the check engine light?

Yes, clearing the code will reset the check engine light, but if the underlying issue is not resolved, the code is likely to return.

Are there any preventive measures to avoid the P042E code?

Regular maintenance, including cleaning the EGR system and ensuring proper engine tuning, can help prevent issues that lead to a P042E code.

Is the P042E code related to the vehicle's emissions system?

Yes, the P042E code is directly related to the emissions system, as the EGR system plays a crucial role in reducing harmful emissions from the engine.