P0490 2015 Chevrolet Silverado Code - Exhaust Gas Recirculation Motor Control Circuit High Voltage
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
- P0490 2015 Chevrolet Silverado indicates Exhaust Gas Recirculation Motor Control Circuit High Voltage.
- 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 P0490 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0490 2015 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 P0490 2015 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 P0490 2015 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 P0490 2015 Chevrolet Silverado code?
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Frequently Asked Questions about P0490 2015 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P0490 in a 2015 Chevrolet Silverado?
The common symptoms of code P0490 include rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.
2. What does the OBDII code P0490 for a 2015 Chevrolet Silverado indicate?
Code P0490 indicates a problem with the Exhaust Gas Recirculation (EGR) motor control circuit experiencing high voltage.
3. What are the possible causes of OBDII code P0490 in a 2015 Chevrolet Silverado?
Possible causes of code P0490 include a faulty EGR motor, damaged wiring or connectors in the EGR system, or a problem with the EGR control module.
4. How can I diagnose the OBDII code P0490 in my 2015 Chevrolet Silverado?
Diagnosing code P0490 involves using an OBDII scanner to retrieve the code, inspecting the EGR motor and related components for damage, and testing the EGR circuit for proper voltage.
5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P0490?
It is not recommended to drive your vehicle with code P0490 as it can lead to reduced engine performance and potential damage to other components. It's best to address the issue promptly.
6. How serious is OBDII code P0490 in a 2015 Chevrolet Silverado?
Code P0490 should be addressed promptly as it can affect the vehicle's performance and emissions. Ignoring the issue can lead to more severe problems over time.
7. What are some repair tips for fixing OBDII code P0490 in a 2015 Chevrolet Silverado?
Repair tips for code P0490 include checking and cleaning the EGR system components, testing the EGR motor for proper function, and ensuring all wiring and connectors are in good condition.
8. Can a DIY enthusiast fix OBDII code P0490 in a 2015 Chevrolet Silverado?
A DIY enthusiast with the necessary tools and knowledge of automotive systems may be able to address code P0490 by following a detailed repair guide or seeking assistance from a professional if needed.
9. How much does it typically cost to repair OBDII code P0490 in a 2015 Chevrolet Silverado?
The cost of repairing code P0490 can vary depending on the exact cause of the issue and whether professional labor is required. Costs may include parts replacement, diagnostic fees, and labor charges.
10. How can I prevent OBDII code P0490 from recurring in my 2015 Chevrolet Silverado?
To prevent code P0490 from recurring, it's essential to perform regular maintenance on the EGR system, address any related issues promptly, and drive your vehicle responsibly to avoid stressing the EGR components.
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