P140F 2018 GMC Sierra Code - Exhaust Gas Recirculation Motor Current Performance
Quick Answer
The Engine Control Module (ECM) supplies the Exhaust Gas Recirculation (EGR) valve with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and a signal circuit. 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
- P140F 2018 GMC Sierra indicates Exhaust Gas Recirculation Motor Current 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 P140F 2018 GMC Sierra Description
What are the Possible Causes of the DTC P140F 2018 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 P140F 2018 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 P140F 2018 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.
Need more information about the P140F 2018 GMC Sierra code?
Need more information on how to fix the P140F 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P140F 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P140F 2018 GMC Sierra Code
1. What does the OBDII code P140F mean on a 2018 GMC Sierra?
The code P140F indicates an issue with the Exhaust Gas Recirculation (EGR) motor current performance, suggesting the EGR system is not functioning properly.
2. What are the common symptoms of P140F on a 2018 GMC Sierra?
Symptoms can include a check engine light, reduced engine performance, rough idling, decreased fuel efficiency, or noticeable exhaust issues.
3. What causes the P140F code on a 2018 GMC Sierra?
Common causes include a faulty EGR motor, wiring issues, carbon buildup in the EGR valve, or a malfunctioning EGR position sensor.
4. Can I drive my 2018 GMC Sierra with the P140F code?
While the truck may still be drivable, continuing to drive with this code can lead to reduced performance and potentially damage the engine or emissions system.
5. How do I diagnose the P140F code on a 2018 GMC Sierra?
Diagnose it by inspecting the EGR motor, checking for carbon buildup, testing the wiring and connectors, and using a scan tool to monitor EGR system performance.
6. What repairs are needed to fix the P140F code on a 2018 GMC Sierra?
Repairs may involve cleaning or replacing the EGR valve, repairing wiring or connectors, or replacing a faulty EGR motor or position sensor.
7. How much does it typically cost to fix the P140F code on a 2018 GMC Sierra?
Costs can vary but typically range from $150 to $500 depending on whether cleaning, repair, or part replacement is required.
8. Can a clogged EGR valve cause the P140F code on a 2018 GMC Sierra?
Yes, carbon buildup in the EGR valve can restrict movement and trigger the P140F code.
9. Will resetting the check engine light fix the P140F code on a 2018 GMC Sierra?
Resetting the light may clear it temporarily, but the underlying issue must be addressed to prevent the code from returning.
10. Is the P140F code related to emissions compliance on a 2018 GMC Sierra?
Yes, the EGR system is part of the emissions control system, so a P140F code can lead to a failed emissions test if not resolved.
Discuss the causes and fixes for P140F 2018 GMC Sierra OBDII Code
Code P140F 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
