P040E 2016 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 2 Circuit Erratic
Quick Answer
The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 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
- P040E 2016 GMC Sierra indicates Exhaust Gas Recirculation Temperature Sensor 2 Circuit Erratic.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 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 P040E 2016 GMC Sierra Description
What are the Possible Causes of the DTC P040E 2016 GMC Sierra?
- Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2
- Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted
- Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P040E 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 P040E 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 P040E 2016 GMC Sierra Code
1. What does the OBDII code P040E mean on a 2016 GMC Sierra?
P040E indicates an issue with the Exhaust Gas Recirculation (EGR) Temperature Sensor 2, specifically that the circuit is behaving erratically or inconsistently.
2. What are the symptoms of code P040E in a 2016 GMC Sierra?
Common symptoms include a check engine light, reduced engine performance, rough idling, poor fuel economy, or difficulty passing emissions tests.
3. What causes code P040E to appear on a 2016 GMC Sierra?
Possible causes include a faulty EGR temperature sensor, damaged wiring or connectors, carbon buildup in the EGR system, or issues with the engine control module (ECM).
4. Can driving with code P040E damage my 2016 GMC Sierra?
While it may not cause immediate damage, prolonged driving with this code can lead to increased emissions, reduced performance, and potential damage to the EGR system.
5. How do I diagnose code P040E on my 2016 GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the EGR temperature sensor and wiring, and testing the sensor's resistance and voltage for irregularities.
6. How do I fix code P040E on a 2016 GMC Sierra?
Repairs may include replacing the EGR temperature sensor, cleaning carbon buildup in the EGR system, repairing damaged wiring, or updating the ECM software if necessary.
7. What tools do I need to fix code P040E on my 2016 GMC Sierra?
You’ll need an OBDII scanner, a multimeter for electrical testing, basic hand tools, and possibly specialized tools for accessing the EGR sensor.
8. How much does it cost to fix code P040E on a 2016 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether the sensor needs replacement or if additional repairs (like cleaning) are required.
9. Can I prevent code P040E on my 2016 GMC Sierra?
Regular maintenance, including cleaning the EGR system and inspecting wiring connections, can help prevent this code from recurring.
10. Does code P040E require reprogramming the ECM on a 2016 GMC Sierra?
In most cases, ECM reprogramming is not necessary, but if the issue persists after repairs, a software update may help resolve the problem.
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