AutoCodes – GMC – P06A5 2014 GMC Sierra

P06A5 2014 GMC Sierra Code - 5 Volt Reference 4 Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt circuit poor electrical connection. 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: P06A5 2014 GMC Sierra indicates 5 Volt Reference 4 Circuit High Voltage.
Common causes: Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 166

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 17, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P06A5 2014 GMC Sierra Description

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Each internal reference circuit provides external 5 Volt reference circuits for more than one sensor. A short to ground or short to voltage on one external 5 Volt reference circuit can affect all the components connected to the same internal 5 Volt reference circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a higher than the expected voltage on any of the 5 Volt reference circuits for greater than 0.5 s.

OBDII Code P06A5 2014 GMC Sierra - 5 Volt Reference 4 Circuit High Voltage - AutoCodes.com — P06A5 2014 GMC Sierra Code - 5 Volt Reference 4 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P06A5 2014 GMC Sierra?

Faulty Sensor on 5 Volt circuit
Sensor on 5 Volt circuit harness is open or shorted
Sensor on 5 Volt circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P06A5 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P06A5 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P06A5 2014 GMC Sierra code?

Need more information on how to fix the P06A5 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P06A5 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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.

Frequently Asked Questions about P06A5 2014 GMC Sierra Code

What does OBDII code P06A5 mean on a 2014 GMC Sierra?

Code P06A5 indicates a problem with the 5 Volt Reference 4 Circuit, specifically a high voltage condition.

What are the common symptoms of code P06A5 in a 2014 GMC Sierra?

Symptoms may include the check engine light being on, erratic sensor readings, engine performance issues, or even stalling.

What causes the P06A5 code to appear in a GMC Sierra?

Common causes include a short to voltage in the 5V reference circuit, a failing sensor, damaged wiring, or a malfunctioning Engine Control Module (ECM).

Can I drive my 2014 GMC Sierra with the P06A5 code?

Itâ€™s not recommended, as the issue could lead to further engine problems or unpredictable behavior, potentially causing unsafe driving conditions.

How do I diagnose the P06A5 code on my GMC Sierra?

Start by inspecting the 5V reference circuit wiring and connectors for damage, then check for shorts or open circuits, followed by testing the sensors using the 5V reference.

What is the 5 Volt Reference Circuit in a 2014 GMC Sierra?

The 5 Volt Reference Circuit provides a consistent 5-volt signal from the ECM to various sensors, which is critical for accurate sensor readings.

Which sensors use the 5 Volt Reference 4 Circuit in a 2014 GMC Sierra?

The circuit may supply sensors like the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, or others depending on the configuration.

How much does it cost to fix the P06A5 code on a GMC Sierra?

Repair costs vary but can range from $100 for minor wiring repairs to $500 or more if a sensor or ECM replacement is needed.

Can a bad ECM cause the P06A5 code?

Yes, a malfunctioning ECM could incorrectly regulate the 5V reference voltage, leading to a high voltage condition.

How can I prevent the P06A5 code from recurring?

Regularly inspect and maintain wiring and connectors, avoid aftermarket modifications that could interfere with the circuit, and promptly address any sensor issues.