AutoCodes – Chevrolet – P140F Chevrolet

P140F Chevrolet 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 Chevrolet 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 1,554

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

What does this mean?

What are the Possible Causes of the DTC P140F Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the P140F Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P140F Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P140F 2014 Chevrolet Silverado — Exhaust Gas Recirculation Motor Current Performance
P140F 2015 Chevrolet Silverado — Exhaust Gas Recirculation Motor Current Performance
P140F 2016 Chevrolet Silverado — Exhaust Gas Recirculation Motor Current Performance
P140F 2017 Chevrolet Silverado — Exhaust Gas Recirculation Motor Current Performance
P140F 2018 Chevrolet Silverado — Exhaust Gas Recirculation Motor Current Performance

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 Chevrolet Code

1. What are the common symptoms of OBDII code P140F in a Chevrolet related to Exhaust Gas Recirculation (EGR) Motor Current Performance?

The common symptoms include poor engine performance, reduced fuel efficiency, rough idling, and potential stalling.

2. What are the typical causes of OBDII code P140F in a Chevrolet related to EGR Motor Current Performance?

Common causes include a faulty EGR valve, issues with the EGR motor or sensor, vacuum leaks, clogged EGR passages, or wiring problems.

3. How can I diagnose OBDII code P140F in a Chevrolet related to EGR Motor Current Performance?

Diagnosis typically involves using a scan tool to retrieve the code, checking the EGR system components for any visible damage or blockages, and testing the EGR valve, motor, and sensor for proper functionality.

4. What are some repair tips for fixing OBDII code P140F in a Chevrolet related to EGR Motor Current Performance?

Repair tips may include cleaning or replacing the EGR valve, checking and repairing any vacuum leaks, clearing out any clogged EGR passages, and ensuring proper electrical connections.

5. Is it safe to continue driving my Chevrolet with OBDII code P140F related to EGR Motor Current Performance?

It is not recommended to continue driving with this code unresolved, as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

6. Can I reset the OBDII code P140F in my Chevrolet related to EGR Motor Current Performance by disconnecting the battery?

While disconnecting the battery may temporarily clear the code, it is not a recommended long-term solution. It's important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P140F in a Chevrolet related to EGR Motor Current Performance?

The cost of repair can vary depending on the specific issue causing the code, the labor rates in your area, and whether any parts need to be replaced. It's advisable to consult a mechanic for an accurate estimate.

8. Will OBDII code P140F in a Chevrolet related to EGR Motor Current Performance cause my vehicle to fail an emissions test?

Yes, this code is related to the EGR system, which plays a crucial role in reducing emissions. If left unresolved, it can lead to a failed emissions test.

9. How long does it typically take to repair OBDII code P140F in a Chevrolet related to EGR Motor Current Performance?

The repair time can vary depending on the exact cause of the issue and the complexity of the repair needed. Some fixes may be completed within a few hours, while others may take longer.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P140F in a Chevrolet related to EGR Motor Current Performance?

Depending on the specific cause of the code, some repairs related to the EGR system may be tackled by a DIY enthusiast with the necessary tools and knowledge. However, more complex issues may require professional assistance.