P06A4 2014 GMC Sierra Code - 5 Volt Reference 4 Circuit Low Voltage
Quick Answer
The P06A4 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the 5 Volt Reference 4 Circuit Low Voltage. Common causes include Wiring Issues: Damaged or corroded wiring in the 5 volt reference circuit can lead to low voltage readings, Faulty Sensor: A sensor connected to the 5 volt reference circuit that is drawing too much current can cause the voltage to drop, Short Circuit: A short circuit in the wiring or connectors can disrupt the 5 volt reference 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
- P06A4 2014 GMC Sierra indicates 5 Volt Reference 4 Circuit Low Voltage.
- Common causes
- Common causes include Wiring Issues: Damaged or corroded wiring in the 5 volt reference circuit can lead to low voltage readings, Faulty Sensor: A sensor connected to the 5 volt reference circuit that is drawing too much current can cause the voltage to drop, Short Circuit: A short circuit in the wiring or connectors can disrupt the 5 volt reference 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.
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Code P06A4 2014 GMC Sierra Description
The P06A4 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the 5 Volt Reference 4 Circuit Low Voltage. This code indicates that the voltage on the 5 volt reference circuit 4 is lower than the specified range. The 5 volt reference circuit provides a stable 5-volt supply to various sensors and components throughout the vehicle. When the voltage on this circuit drops below the expected range, it can cause issues with the operation of these sensors and components.
Common Causes of P06A4 2014 GMC Sierra
- Wiring Issues: Damaged or corroded wiring in the 5 volt reference circuit can lead to low voltage readings.
- Faulty Sensor: A sensor connected to the 5 volt reference circuit that is drawing too much current can cause the voltage to drop.
- Short Circuit: A short circuit in the wiring or connectors can disrupt the 5 volt reference circuit.
- Power Supply Problem: An issue with the power supply to the circuit, such as a faulty voltage regulator, can result in low voltage.
Symptoms of P06A4 2014 GMC Sierra
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Engine Performance: The vehicle may experience reduced engine performance, including hesitation, rough idling, or decreased power.
- Erratic Sensor Readings: Sensors that rely on the 5 volt reference circuit may provide erratic or incorrect readings, leading to drivability issues.
- Poor Fuel Efficiency: A decrease in voltage on the 5 volt reference circuit can impact fuel delivery, resulting in poor fuel efficiency.
- Engine Stalling: In severe cases, the low voltage on the circuit may cause the engine to stall unexpectedly.
How to Fix P06A4 2014 GMC Sierra
- Diagnose the Issue: Use a multimeter to check the voltage on the 5 volt reference circuit and identify the source of the low voltage.
- Inspect Wiring and Connectors: Thoroughly inspect the wiring and connectors in the 5 volt reference circuit for any damage or corrosion.
- Test Sensors: Test the sensors connected to the circuit to determine if any are drawing excessive current and causing the voltage drop.
- Repair or Replace Components: Repair any damaged wiring or connectors, replace faulty sensors, or address any other issues identified during diagnosis.
- Clear Codes and Test Drive: After making the necessary repairs, clear the DTCs, and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P06A4 2014 GMC Sierra
The typical repair costs for addressing a P06A4 code on a 2014 GMC Sierra can range from $100 to $400, depending on the specific cause of the issue and the parts that need to be replaced. This estimate includes the cost of parts and labor. However, it's important to note that the actual cost can vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Diagnostic time and labor rates at auto repair shops typically range from $80 to $150 per hour. Rates may be higher at dealerships or in metropolitan areas, while independent shops often charge less. It's recommended to obtain quotes from multiple repair facilities to get a more accurate estimate for the repair.
Tech Notes for P06A4 2014 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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