P140D GMC Code - Exhaust Gas Recirculation Motor Control Circuit 2 Low Voltage
Quick Answer
The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation Motor. Common causes include Faulty Exhaust Gas Recirculation Motor, Exhaust Gas Recirculation Motor harness is open or shorted, Exhaust Gas Recirculation Motor 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
- P140D GMC indicates Exhaust Gas Recirculation Motor Control Circuit 2 Low Voltage.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation Motor, Exhaust Gas Recirculation Motor harness is open or shorted, Exhaust Gas Recirculation Motor 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 P140D GMC Description
What are the Possible Causes of the DTC P140D GMC?
- Faulty Exhaust Gas Recirculation Motor
- Exhaust Gas Recirculation Motor harness is open or shorted
- Exhaust Gas Recirculation Motor circuit poor electrical connection
How to Fix the DTC P140D GMC?
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 P140D GMC 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 P140D GMC Code
1. What does the OBDII code P140D mean on a GMC vehicle?
P140D indicates a problem with the Exhaust Gas Recirculation (EGR) Motor Control Circuit 2, specifically a low voltage issue detected by the engine control module (ECM).
2. What are the symptoms of code P140D on a GMC?
Common symptoms include poor engine performance, increased emissions, rough idling, stalling, or the illumination of the check engine light.
3. What causes the P140D code to appear on a GMC?
Possible causes include a faulty EGR motor, issues with the EGR motor wiring or connectors, a malfunctioning ECM, or a low-voltage condition in the vehicle’s electrical system.
4. Can I drive my GMC with the P140D code?
Driving with this code is not recommended, as it can lead to increased emissions, reduced fuel efficiency, and potential engine damage over time.
5. How do I diagnose the P140D code on my GMC?
Diagnosis involves checking the EGR motor, inspecting wiring and connectors for damage or corrosion, and testing the voltage and resistance in the EGR motor control circuit.
6. What repairs can fix the P140D code on a GMC?
Repairs may include replacing the EGR motor, repairing or replacing damaged wiring or connectors, or reprogramming/updating the ECM if necessary.
7. How much does it cost to fix the P140D code on a GMC?
The cost depends on the issue, ranging from $100 to $300 for wiring repairs or EGR motor replacement, with additional labor costs.
8. Can a dirty EGR valve cause the P140D code?
A dirty or clogged EGR valve is not a direct cause of this code, but it can lead to related EGR system issues that should be addressed.
9. Will resetting the ECM clear the P140D code?
Resetting the ECM may temporarily clear the code, but the underlying issue must be fixed to prevent the code from returning.
10. How can I prevent the P140D code from recurring on my GMC?
Regular maintenance, including inspecting the EGR system, keeping electrical connections clean, and addressing wiring issues promptly, can help prevent this code.
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