AutoCodes – Chevrolet – P140F 2017 Chevrolet Silverado

P140F 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado 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.

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Code Popularity 244

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 Jun 19, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P140F 2017 Chevrolet Silverado Description

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. The EGR position sensor provides a signal voltage that changes relative to the EGR position. The EGR position sensor information is transmitted between the EGR valve and the ECM on the signal circuit. The Mass Air Flow (MAF) sensor signal is used by the ECM to detect the proper amount of EGR flow. The ECM will close the EGR valve, then open the EGR valve to 100%. The ECM will then calculate the MAF difference and determine if the proper EGR flow has been detected. The Diagnostic Trouble Code (DTC) will be set when the ECM detects excessive current flow to the EGR motor for greater than 2.5 s.

OBDII Code P140F 2017 Chevrolet Silverado - Exhaust Gas Recirculation Motor Current Performance - AutoCodes.com — P140F 2017 Chevrolet Silverado Code - Exhaust Gas Recirculation Motor Current Performance

What does this mean?

What are the Possible Causes of the DTC P140F 2017 Chevrolet Silverado?

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 2017 Chevrolet Silverado?

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 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P140F 2017 Chevrolet Silverado 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 P140F 2017 Chevrolet Silverado Code

1. What does the OBDII code P140F mean on a 2017 Chevrolet Silverado?

P140F indicates an issue with the Exhaust Gas Recirculation (EGR) motor's current performance, suggesting it is not operating within the expected parameters.

2. What are the common symptoms of the P140F code?

Symptoms may include reduced engine performance, poor fuel efficiency, rough idling, increased emissions, and the Check Engine Light turning on.

3. What causes the P140F code to appear?

Possible causes include a malfunctioning EGR motor, carbon buildup in the EGR system, faulty wiring or connectors, or issues with the powertrain control module (PCM).

4. How do I diagnose the P140F code on my 2017 Silverado?

Start by using an OBDII scanner to confirm the code. Then inspect the EGR motor, wiring, and connectors for damage, and check for carbon buildup in the EGR valve and passages.

5. Can I drive with the P140F code active?

Driving with this code is not recommended, as it can lead to reduced performance, increased emissions, and potential long-term engine damage if not addressed.

6. How do I fix the P140F code?

Repairs may involve cleaning or replacing the EGR valve, repairing damaged wiring or connectors, or replacing the EGR motor if it is faulty.

7. How much does it cost to repair the P140F code?

Repair costs vary but typically range from $150 to $600 depending on whether cleaning or replacement of the EGR valve or motor is needed.

8. Can a clogged EGR valve cause the P140F code?

Yes, carbon buildup or clogging in the EGR valve or passages can restrict airflow and trigger this code.

9. Does the P140F code affect emissions?

Yes, a malfunctioning EGR system can increase NOx emissions, potentially causing the vehicle to fail an emissions test.

10. Do I need to reprogram the PCM after fixing the P140F code?

In most cases, reprogramming the PCM is not necessary, but clearing the code with an OBDII scanner and performing a test drive to confirm the issue is resolved is recommended.