P06A4 2016 GMC Sierra Code - 5 Volt Reference 4 Circuit Low Voltage
Quick Answer
The P06A4 diagnostic trouble code (DTC) indicates that the 5 Volt Reference 4 Circuit in the 2016 GMC Sierra is experiencing low voltage. Common causes include Faulty wiring harness, Defective sensor or component, Corroded or loose connections. 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
- P06A4 2016 GMC Sierra indicates 5 Volt Reference 4 Circuit Low Voltage.
- Common causes
- Common causes include Faulty wiring harness, Defective sensor or component, Corroded or loose connections.
- 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 P06A4 2016 GMC Sierra Description
The P06A4 diagnostic trouble code (DTC) indicates that the 5 Volt Reference 4 Circuit in the 2016 GMC Sierra is experiencing low voltage. The 5 Volt Reference circuit is crucial for the functioning of various sensors and components in the vehicle's engine management system. It serves as a stable voltage source that allows sensors to provide accurate readings to the Engine Control Module (ECM) or Powertrain Control Module (PCM).
Common Causes of P06A4 2016 GMC Sierra
- Faulty wiring harness
- Defective sensor or component
- Corroded or loose connections
- Malfunctioning ECM/PCM
- Electrical shorts or open circuits
Symptoms of P06A4 2016 GMC Sierra
- Rough idling or engine stalling
- Poor acceleration or hesitation
- Decreased fuel efficiency
- Engine misfires
- Illumination of the Check Engine Light
How to Fix P06A4 2016 GMC Sierra
- Begin by inspecting the wiring harness for any visible damage, corrosion, or loose connections. Repair or replace any damaged wires or connectors.
- Test the sensors and components connected to the 5 Volt Reference 4 Circuit for proper operation. Replace any faulty parts.
- Check the ECM/PCM for any signs of malfunction. Perform a diagnostic scan to identify any additional DTCs and address them accordingly.
- Clear the DTC using a scan tool and perform a test drive to ensure the issue has been resolved.
- If the problem persists, consult a professional mechanic for further diagnosis and repair.
Cost to Fix P06A4 2016 GMC Sierra
The cost of repairing a P06A4 DTC can vary depending on the specific cause of the issue. On average, the repair costs for this type of problem can range from $100 to $500, including parts and labor. However, it's important to note that labor rates and part prices can vary significantly based on location, vehicle make and model, and the complexity of the repair. It's recommended to obtain quotes from local auto repair shops for a more accurate estimate.
Tech Notes for P06A4 2016 GMC Sierra
The 5 Volt reference 4 circuit provides 5 Volt to the following sensors: (Some models may have different sensors, please consult the factory service manual for the list of sensors for your model and year)
- Accelerator pedal position sensor 1
- Throttle position sensor
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