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P06A4 2015 Chevrolet Silverado Code - 5 Volt Reference 4 Circuit Low Voltage

Quick Answer

The P06A4 diagnostic trouble code (DTC) indicates a low voltage condition in the 5 Volt Reference 4 circuit of the 2015 Chevrolet Silverado. Common causes include Damaged or frayed wiring in the 5 Volt Reference circuit, Poor electrical connections or corroded terminals affecting voltage delivery, Faulty sensors that draw excessive current, causing a voltage drop. 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 2015 Chevrolet Silverado indicates 5 Volt Reference 4 Circuit Low Voltage.
Common causes
Common causes include Damaged or frayed wiring in the 5 Volt Reference circuit, Poor electrical connections or corroded terminals affecting voltage delivery, Faulty sensors that draw excessive current, causing a voltage drop.
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 Oct 16, 2024
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Code P06A4 2015 Chevrolet Silverado Description

The P06A4 diagnostic trouble code (DTC) indicates a low voltage condition in the 5 Volt Reference 4 circuit of the 2015 Chevrolet Silverado. This circuit is crucial for providing a stable reference voltage to various sensors and components within the vehicle's electronic control system. The 5 Volt Reference circuits are typically used by sensors such as the throttle position sensor, mass airflow sensor, and various other critical components that rely on this voltage to function correctly.

OBDII Code P06A4 2015 Chevrolet Silverado - 5 Volt Reference 4 Circuit Low Voltage
P06A4 2015 Chevrolet Silverado Code - 5 Volt Reference 4 Circuit Low Voltage

Common Causes of P06A4 2015 Chevrolet Silverado

  1. Damaged or frayed wiring in the 5 Volt Reference circuit.
  2. Poor electrical connections or corroded terminals affecting voltage delivery.
  3. Faulty sensors that draw excessive current, causing a voltage drop.
  4. A malfunctioning Engine Control Module (ECM) that fails to provide the correct reference voltage.
  5. Short circuits or grounding issues within the wiring harness.

Symptoms of P06A4 2015 Chevrolet Silverado

  1. Check Engine Light illuminated on the dashboard.
  2. Erratic engine performance, including stalling or hesitation during acceleration.
  3. Poor fuel economy due to incorrect sensor readings.
  4. Difficulty starting the vehicle or rough idle.
  5. Inconsistent readings from various sensors that rely on the 5 Volt Reference circuit.

How to Fix P06A4 2015 Chevrolet Silverado

  1. Visual Inspection: Begin with a thorough visual inspection of the wiring harness and connectors associated with the 5 Volt Reference 4 circuit. Look for signs of damage, corrosion, or loose connections.
  2. Voltage Testing: Use a multimeter to measure the voltage at the 5 Volt Reference circuit. Compare the readings to the specifications outlined in the vehicle's service manual.
  3. Repair or Replace Wiring: If damaged wiring or connectors are found, repair or replace them to restore proper electrical continuity.
  4. Sensor Testing: Test the sensors that utilize the 5 Volt Reference circuit for proper operation. Replace any faulty sensors that may be drawing excessive current.
  5. ECM Diagnosis: If all other components are functioning correctly, consider testing or reprogramming the ECM to ensure it is providing the correct reference voltage.

Cost to Fix P06A4 2015 Chevrolet Silverado

The typical repair costs for addressing a P06A4 code can range from $150 to $600, depending on the specific cause of the issue. This estimate includes parts such as wiring harnesses or sensors, which can vary in price. Labor costs can also differ significantly based on location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour; however, rates may be higher at dealerships or in metropolitan areas, while independent shops often offer lower rates. It is advisable to check local rates for a more precise estimate and to obtain quotes from multiple repair facilities to ensure a fair price.

What does this mean?

Tech Notes for P06A4 2015 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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  • Thank you so much. I have been doing so much digging and research and this confirmed my suspicions on my truck.

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