AutoCodes – Pontiac – P042E Pontiac

P042E Pontiac 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 Pontiac 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 1,948

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 Pontiac 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 Pontiac - Exhaust Gas Recirculation Closed Position Performance - AutoCodes.com — P042E Pontiac Code - Exhaust Gas Recirculation Closed Position Performance

What does this mean?

What are the Possible Causes of the DTC P042E Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac code?

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Need Help with the Code?

Get the P042E Pontiac 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 P042E Pontiac Code

1. What are the common symptoms of OBDII code P042E in a Pontiac?

- Common symptoms include rough idling, reduced engine performance, and an illuminated check engine light.

2. What can cause the OBDII code P042E in a Pontiac to trigger?

- The code P042E is typically triggered by issues with the exhaust gas recirculation (EGR) system, such as a closed EGR valve or a malfunctioning EGR sensor.

3. How can I diagnose the cause of the OBDII code P042E in my Pontiac?

- To diagnose the issue, you can perform a visual inspection of the EGR valve, check for vacuum leaks, and use an OBDII scanner to read the trouble codes and monitor EGR system data.

4. What are some possible repair tips for fixing the OBDII code P042E in a Pontiac?

- Repair tips may include cleaning or replacing the EGR valve, checking and replacing the EGR sensor, inspecting and repairing any damaged vacuum lines, and ensuring proper EGR system operation.

5. Can I continue driving my Pontiac with the OBDII code P042E present?

- It is not recommended to drive your vehicle with the code P042E present, as it can lead to reduced fuel efficiency, engine performance issues, and potential damage to other engine components.

6. How much does it typically cost to repair the OBDII code P042E in a Pontiac?

- The cost of repairs for the code P042E can vary depending on the specific issue, but it may range from $100 to $500 or more, including parts and labor.

7. Are there any preventive measures to avoid the OBDII code P042E in a Pontiac?

- Regular maintenance, such as cleaning the EGR system components, checking for vacuum leaks, and using high-quality fuel, can help prevent issues that may trigger the code P042E.

8. Can a DIY enthusiast fix the OBDII code P042E in a Pontiac?

- Depending on your mechanical skills and access to tools, some DIY enthusiasts may be able to diagnose and repair the code P042E themselves, but it is recommended to consult a professional if unsure.

9. How long does it take to repair the OBDII code P042E in a Pontiac?

- The repair time for the code P042E can vary based on the specific issue and the complexity of the repair, but it may take anywhere from one to several hours to complete.

10. Is it necessary to reset the OBDII code P042E after repairs are made on a Pontiac?

- Yes, it is important to reset the trouble codes using an OBDII scanner after repairs are made to clear the code P042E and allow the vehicle's computer to reevaluate the system.