P0490 2014 GMC Sierra Code - Exhaust Gas Recirculation Motor Control Circuit High Voltage
Quick Answer
The P0490 diagnostic trouble code (DTC) in a 2014 GMC Sierra indicates a problem with the Exhaust Gas Recirculation (EGR) motor control circuit having a high voltage. Common causes include Malfunctioning EGR valve, Faulty EGR motor, Damaged wiring or connectors in the EGR motor control circuit. 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 2014 GMC Sierra indicates Exhaust Gas Recirculation Motor Control Circuit High Voltage.
- Common causes
- Common causes include Malfunctioning EGR valve, Faulty EGR motor, Damaged wiring or connectors in the EGR motor control circuit.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0490 2014 GMC Sierra Description
The P0490 diagnostic trouble code (DTC) in a 2014 GMC Sierra indicates a problem with the Exhaust Gas Recirculation (EGR) motor control circuit having a high voltage. The EGR system is responsible for recirculating a portion of the exhaust gases back into the engine's intake manifold to reduce emissions and control combustion temperatures. The EGR motor control circuit is crucial for regulating the EGR valve's operation, which ensures the correct amount of exhaust gas is recirculated.
Common Causes of P0490 2014 GMC Sierra
- Malfunctioning EGR valve
- Faulty EGR motor
- Damaged wiring or connectors in the EGR motor control circuit
- Issues with the engine control module (ECM)
- Carbon buildup in the EGR system
Symptoms of P0490 2014 GMC Sierra
- Decreased fuel efficiency
- Rough idling
- Engine misfires
- Engine stalling
- Check Engine Light illuminated
How to Fix P0490 2014 GMC Sierra
- Diagnose the EGR system: Use a scan tool to retrieve the trouble codes and perform a thorough inspection of the EGR valve, motor, wiring, and connectors.
- Test the EGR motor control circuit: Check the voltage levels in the circuit to determine if they are within the specified range.
- Replace faulty components: If the EGR valve, motor, or wiring is found to be defective, replace them with new parts.
- Clear the trouble codes: After completing the repairs, clear the DTCs from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
- Perform a relearn procedure: Some vehicles may require a relearn procedure for the ECM to recalibrate the EGR system.
Cost to Fix P0490 2014 GMC Sierra
The typical repair costs for addressing a P0490 code in a 2014 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to inquire about local rates for a more accurate estimate. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.
Need more information about the P0490 2014 GMC Sierra code?
Need more information on how to fix the P0490 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0490 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0490 2014 GMC Sierra Code
1. What does the P0490 code mean on a 2014 GMC Sierra?
The P0490 code indicates a high voltage issue in the Exhaust Gas Recirculation (EGR) motor control circuit, which may prevent proper operation of the EGR system.
2. What are the symptoms of a P0490 code in a 2014 GMC Sierra?
Symptoms can include a check engine light, reduced engine performance, rough idling, poor fuel efficiency, or increased emissions.
3. What causes the P0490 code to appear?
Common causes include a faulty EGR valve, damaged wiring or connectors in the EGR circuit, a malfunctioning EGR control module, or carbon buildup restricting EGR valve movement.
4. Can I drive my 2014 GMC Sierra with a P0490 code?
While the vehicle may still run, driving with this code can lead to diminished performance, increased emissions, and potential damage to other components if not addressed promptly.
5. How is the P0490 code diagnosed?
A mechanic will use an OBDII scanner to confirm the code, inspect EGR system wiring and connectors, test the EGR valve, and check for carbon buildup or other obstructions.
6. How do I fix the P0490 code on a 2014 GMC Sierra?
Repairs may include cleaning or replacing the EGR valve, repairing damaged wiring or connectors, or replacing the EGR control module if faulty.
7. Can a dirty EGR valve trigger a P0490 code?
Yes, carbon buildup in the EGR valve can cause it to stick, leading to abnormal voltage signals and triggering the P0490 code.
8. How much does it cost to fix a P0490 code on a 2014 GMC Sierra?
Repair costs can vary but typically range from $150 to $500, depending on whether cleaning or part replacement is needed.
9. Is the P0490 code related to emissions issues?
Yes, a malfunctioning EGR system can increase nitrogen oxide emissions and may cause the vehicle to fail an emissions test.
10. Can I reset the P0490 code without repairs?
You can clear the code with an OBDII scanner, but if the underlying issue isn't fixed, the code will likely return.
Discuss the causes and fixes for P0490 2014 GMC Sierra OBDII Code
Code P0490 2014 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.