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P06A3 2016 Chevrolet Silverado Code - 5 Volt Reference 4 Circuit

Quick Answer

The P06A3 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado 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 drawing too much current, Malfunctioning ECM not regulating voltage properly. 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 Chevrolet Silverado 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 drawing too much current, Malfunctioning ECM not regulating voltage properly.
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 14, 2024
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Code P06A3 2016 Chevrolet Silverado Description

The P06A3 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado 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 sensors such as the throttle position sensor, manifold absolute pressure sensor, and others that rely on this voltage to function accurately.

OBDII Code P06A3 2016 Chevrolet Silverado - 5 Volt Reference 4 Circuit
P06A3 2016 Chevrolet Silverado Code - 5 Volt Reference 4 Circuit

Common Causes of P06A3 2016 Chevrolet Silverado

  1. Damaged wiring or connectors in the 5 Volt Reference 4 Circuit.
  2. A faulty sensor drawing too much current.
  3. Malfunctioning ECM not regulating voltage properly.
  4. Water or corrosion in the circuit.
  5. Electrical short in the circuit.

Symptoms of P06A3 2016 Chevrolet Silverado

  1. Check Engine Light illuminated on the dashboard.
  2. Engine running rough or misfiring.
  3. Reduced engine power or acceleration.
  4. Poor fuel economy.
  5. Difficulty starting the engine.

How to Fix P06A3 2016 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the wiring and connectors in the 5 Volt Reference 4 Circuit to look for any signs of damage or corrosion.
  2. Test the sensors connected to the circuit to determine if any are drawing excessive current and replace as necessary.
  3. Check the ECM for proper operation and replace if found to be faulty.
  4. Clear the DTC and reset the ECM to see if the issue persists.
  5. If the problem persists, consult a professional mechanic for further diagnosis and repair.

Cost to Fix P06A3 2016 Chevrolet Silverado

The typical repair costs for addressing a P06A3 code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts for this repair could range from $50 to $200, while labor costs may range from $100 to $300. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repair needed. Additionally, diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P06A3 2016 Chevrolet Silverado

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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