P042E 2016 GMC Sierra 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 2016 GMC Sierra 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.
Code P042E 2016 GMC Sierra Description
What are the Possible Causes of the DTC P042E 2016 GMC Sierra?
- 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 2016 GMC Sierra?
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 2016 GMC Sierra 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.
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Frequently Asked Questions about P042E 2016 GMC Sierra Code
1. What does the OBDII code P042E mean on a 2016 GMC Sierra?
P042E indicates an issue with the Exhaust Gas Recirculation (EGR) system, specifically that the EGR valve is not functioning properly in its closed position.
2. What are common symptoms of code P042E in a 2016 GMC Sierra?
Symptoms may include reduced engine performance, rough idling, decreased fuel efficiency, an illuminated check engine light, and possible engine knocking.
3. What causes the P042E code on a 2016 GMC Sierra?
Common causes include a stuck EGR valve, carbon buildup, a faulty EGR position sensor, wiring issues, or problems with the EGR system circuitry.
4. Can I drive my 2016 GMC Sierra with a P042E code?
While the vehicle may still be drivable, prolonged use with this code can lead to reduced performance, increased emissions, and potential engine damage if not addressed.
5. How do I diagnose the P042E code on a 2016 GMC Sierra?
Diagnosis typically involves scanning for additional codes, inspecting the EGR valve for sticking or clogging, testing the EGR position sensor, and checking wiring and connectors for damage.
6. How can I fix the P042E code on my 2016 GMC Sierra?
Repairs may include cleaning or replacing the EGR valve, repairing wiring or connectors, or replacing the EGR position sensor if found faulty.
7. What tools are needed to fix the P042E code on a 2016 GMC Sierra?
Essential tools include an OBDII scanner, a multimeter, and basic hand tools for EGR valve removal and cleaning.
8. Can a dirty EGR valve cause the P042E code on a 2016 GMC Sierra?
Yes, carbon buildup can cause the EGR valve to stick or not close properly, leading to the P042E code.
9. How much does it cost to fix the P042E code on a 2016 GMC Sierra?
The cost can vary from $100 to $300 for cleaning or replacing the EGR valve, but additional repairs may increase the price.
10. Can a software update fix the P042E code on a 2016 GMC Sierra?
In some cases, a software update from the manufacturer may resolve EGR system performance issues, but this depends on the specific cause of the code.
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