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Engine-Codes – GMC – P06A3 2016 GMC Sierra

P06A3 2016 GMC Sierra Code - 5 Volt Reference 4 Circuit

Quick Answer

The P06A3 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the 5 Volt Reference 4 Circuit. Common causes include Damaged wiring or connectors in the 5 Volt Reference 4 Circuit, A faulty sensor or component drawing excessive voltage, Corrosion or moisture affecting the 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
P06A3 2016 GMC Sierra indicates 5 Volt Reference 4 Circuit.
Common causes
Common causes include Damaged wiring or connectors in the 5 Volt Reference 4 Circuit, A faulty sensor or component drawing excessive voltage, Corrosion or moisture affecting the 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P06A3 2016 GMC Sierra Description

The P06A3 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the 5 Volt Reference 4 Circuit. This code indicates that there is a malfunction in the circuit responsible for providing a 5-volt reference signal to various sensors and components in the vehicle. The 5-volt reference signal is crucial for the proper operation of these sensors and components, as it allows them to accurately measure and transmit data to the engine control module (ECM) for optimal performance.

OBDII Code P06A3 2016 GMC Sierra - 5 Volt Reference 4 Circuit
P06A3 2016 GMC Sierra Code - 5 Volt Reference 4 Circuit

Common Causes of P06A3 2016 GMC Sierra

  1. Damaged wiring or connectors in the 5 Volt Reference 4 Circuit
  2. A faulty sensor or component drawing excessive voltage
  3. Corrosion or moisture affecting the circuit
  4. Short circuit in the wiring
  5. ECM malfunction affecting the 5-volt reference signal

Symptoms of P06A3 2016 GMC Sierra

  1. Engine misfires or rough idling
  2. Reduced engine power
  3. Illumination of the Check Engine Light
  4. Stalling or difficulty starting the vehicle
  5. Inaccurate sensor readings displayed on the dashboard

How to Fix P06A3 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the wiring, connectors, and components associated with the 5 Volt Reference 4 Circuit.
  2. Use a multimeter to test the voltage levels in the circuit and identify any abnormalities.
  3. Replace any damaged wiring, connectors, or components that are causing the malfunction.
  4. Clear the DTC from the ECM's memory using a diagnostic scan tool.
  5. Perform a test drive to ensure the issue has been resolved and that the 5-volt reference signal is functioning properly.

Cost to Fix P06A3 2016 GMC Sierra

The typical repair costs for addressing a P06A3 DTC can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the parts required for this repair may range from $50 to $200, while labor costs can add an additional $100 to $300. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on various factors, so it's advisable to inquire locally for a more accurate estimate.

What does this mean?

Tech Notes for P06A3 2016 GMC Sierra

Disconnecting one component at a time from the affected 5 Volt reference circuit while observing the scan tool 5 Volt Reference Circuit Status parameter may help locate the fault. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all 5 Volt reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.



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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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