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P06A4 2016 Chevrolet Silverado Code - 5 Volt Reference 4 Circuit Low Voltage

Quick Answer

The P06A4 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates a 5 Volt Reference 4 Circuit Low Voltage. Common causes include Wiring harness issues, Damaged connectors, Faulty sensor. 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 Chevrolet Silverado indicates 5 Volt Reference 4 Circuit Low Voltage.
Common causes
Common causes include Wiring harness issues, Damaged connectors, Faulty sensor.
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 17, 2024
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Code P06A4 2016 Chevrolet Silverado Description

The P06A4 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates a 5 Volt Reference 4 Circuit Low Voltage. This code is typically triggered when the Engine Control Module (ECM) detects that the voltage on the 5-volt reference circuit for a specific sensor is lower than the expected range. The 5-volt reference circuit is crucial for providing a stable voltage supply to various sensors and components throughout the vehicle.

OBDII Code P06A4 2016 Chevrolet Silverado - 5 Volt Reference 4 Circuit Low Voltage
P06A4 2016 Chevrolet Silverado Code - 5 Volt Reference 4 Circuit Low Voltage

Common Causes of P06A4 2016 Chevrolet Silverado

  1. Wiring harness issues
  2. Damaged connectors
  3. Faulty sensor
  4. Malfunctioning ECM
  5. Short circuit in the 5-volt reference circuit

Symptoms of P06A4 2016 Chevrolet Silverado

  1. Rough idling or engine misfires
  2. Decreased fuel efficiency
  3. Stalling or hesitation during acceleration
  4. Illumination of the Check Engine Light
  5. Loss of power or performance

How to Fix P06A4 2016 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the wiring harness and connectors associated with the 5-volt reference circuit.
  2. Test the sensors connected to the 5-volt reference circuit to identify any faulty components.
  3. Check the ECM for any signs of damage or malfunction.
  4. Repair or replace any damaged wiring, connectors, sensors, or the ECM as needed to restore proper voltage supply.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P06A4 2016 Chevrolet Silverado

The typical repair costs for addressing a P06A4 code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts such as sensors, wiring harnesses, connectors, or an ECM can range from $100 to $500 or more. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair time varying based on the complexity of the issue. Overall, the total repair cost for addressing a 5 Volt Reference 4 Circuit Low Voltage code can range from $200 to $1000 or more, depending on the extent of the repairs needed. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific diagnosis and repair requirements for your vehicle.

What does this mean?

Tech Notes for P06A4 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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