P3443 2017 GMC Sierra Code - Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
Quick Answer
The P3443 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Cylinder 6 Deactivation Solenoid Valve Control Circuit. Common causes include Faulty wiring or connectors in the solenoid valve control circuit, Malfunctioning solenoid valve, Issues with the engine control module (ECM). 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
- P3443 2017 GMC Sierra indicates Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty wiring or connectors in the solenoid valve control circuit, Malfunctioning solenoid valve, Issues with the engine control module (ECM).
- 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 P3443 2017 GMC Sierra Description
The P3443 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Cylinder 6 Deactivation Solenoid Valve Control Circuit. This solenoid valve is responsible for controlling the deactivation of cylinder 6 in the engine, which is a feature designed to improve fuel efficiency by shutting down certain cylinders under light load conditions. When the control circuit voltage is detected as being low, it means that there is an issue with the electrical signal that controls the solenoid valve.
Common Causes of P3443 2017 GMC Sierra
- Faulty wiring or connectors in the solenoid valve control circuit
- Malfunctioning solenoid valve
- Issues with the engine control module (ECM)
- Electrical short or open circuit in the control circuit
- Corrosion or damage to the electrical connections
Symptoms of P3443 2017 GMC Sierra
- Reduced fuel efficiency
- Engine misfires
- Loss of power
- Illumination of the check engine light
- Rough idling
How to Fix P3443 2017 GMC Sierra
- Begin by conducting a thorough inspection of the solenoid valve control circuit, checking for any visible damage to wiring or connectors.
- Test the solenoid valve itself to determine if it is functioning properly or needs to be replaced.
- Check the engine control module (ECM) for any fault codes or issues that may be affecting the solenoid valve control circuit.
- Repair or replace any damaged wiring, connectors, or components in the control circuit.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P3443 2017 GMC Sierra
The typical repair costs for addressing a P3443 DTC on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for a new solenoid valve and any necessary wiring or connectors can range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair time estimated at 1-2 hours. Therefore, the total repair cost could range from $180 to $450. It's important to note that these costs are estimates and can vary based on factors such as location, vehicle make and model, and the extent of the repairs needed.
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Frequently Asked Questions about P3443 2017 GMC Sierra Code
What does the P3443 code mean on a 2017 GMC Sierra?
The P3443 code indicates a low voltage issue in the Cylinder 6 Deactivation Solenoid Valve Control Circuit, which is part of the Active Fuel Management (AFM) system.
What are the common symptoms of the P3443 code?
Symptoms may include reduced engine performance, rough idling, poor fuel economy, an illuminated check engine light, and cylinder deactivation not functioning properly.
What causes the P3443 code to appear?
Common causes include a faulty Cylinder 6 deactivation solenoid, damaged or corroded wiring, poor electrical connections, a failed valve lifter, or a malfunctioning powertrain control module (PCM).
Can I drive my 2017 GMC Sierra with the P3443 code active?
It’s possible to drive with this code, but it is not recommended as it may lead to further engine issues, reduced performance, or potential damage to the AFM system.
How can I diagnose the P3443 code?
Diagnosis typically involves checking the solenoid and circuit for damage, inspecting wiring and connectors for corrosion or breaks, and testing the solenoid with a multimeter to ensure proper operation.
How do you fix the P3443 code?
Repairs may involve replacing the Cylinder 6 deactivation solenoid, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the PCM if necessary.
What tools are needed to troubleshoot the P3443 code?
You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly basic hand tools to access the solenoid and wiring.
How much does it cost to repair the P3443 code?
The cost can range from $100 to $500, depending on whether the issue is a simple wiring repair or requires solenoid replacement and labor.
Could low engine oil cause the P3443 code?
Yes, low or dirty engine oil can affect the AFM system and potentially trigger this code, as proper lubrication is essential for solenoid and lifter operation.
Does the P3443 code always mean the solenoid is bad?
No, the issue could also be due to wiring problems, a poor connection, or a malfunction in the PCM. Proper diagnosis is essential before replacing the solenoid.
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