AutoCodes – Saturn – P042E Saturn

P042E Saturn 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 Saturn 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 1,429

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 Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P042E Saturn 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 Saturn - Exhaust Gas Recirculation Closed Position Performance - AutoCodes.com — P042E Saturn Code - Exhaust Gas Recirculation Closed Position Performance

What does this mean?

What are the Possible Causes of the DTC P042E Saturn?

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 Saturn?

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 Saturn 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 Saturn code?

Need more information on how to fix the P042E Saturn 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 Saturn Code

What does the OBDII code P042E mean for my Saturn?

The code P042E indicates that the Engine Control Module (ECM) has detected a performance issue with the Exhaust Gas Recirculation (EGR) system, specifically that it is not reaching the closed position as expected.

What are common symptoms of the P042E code?

Common symptoms include the check engine light being illuminated, rough idling, decreased fuel efficiency, and increased emissions.

What could cause the P042E code to trigger in my Saturn?

Potential causes include a malfunctioning EGR valve, clogged EGR passages, issues with the EGR solenoid, or problems with the ECM itself.

How can I diagnose the P042E code?

To diagnose the P042E code, you can start with a visual inspection of the EGR system, check for vacuum leaks, test the EGR valve operation, and use a scan tool to analyze live data from the ECM.

What are some common repairs for the P042E code?

Common repairs may include replacing the EGR valve, cleaning the EGR passages, fixing vacuum leaks, or reprogramming or replacing the ECM if itâ€™s found to be faulty.

Will driving with the P042E code cause further damage to my vehicle?

While it may not cause immediate damage, ignoring the P042E code can lead to reduced engine performance and increased emissions, which can eventually lead to more significant issues.

How can I prevent the P042E code from returning after repairs?

To prevent the code from returning, ensure that the EGR system is properly maintained, regularly check for carbon buildup, and address any related issues promptly.

Can I clear the P042E code myself?

Yes, you can clear the P042E code using an OBDII scanner; however, itâ€™s essential to address the underlying issue to prevent the code from reappearing.

Is it safe to drive my Saturn with the P042E code?

While it may be safe to drive short distances, it's advisable to have the issue diagnosed and repaired promptly to avoid potential performance issues and increased emissions.