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Engine-Codes – GMC – P06AC 2017 GMC Sierra

P06AC 2017 GMC Sierra Code - Control Module Power Up Temperature Sensor Performance

Quick Answer

The P06AC code indicates a malfunction related to the Control Module Power Up Temperature Sensor Performance in a 2017 GMC Sierra. Common causes include Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning or damaged, Wiring Issues: Damaged or corroded wiring and connectors that affect the sensor's performance, ECM Software Glitch: A software issue within the ECM that misinterprets sensor data. 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
P06AC 2017 GMC Sierra indicates Control Module Power Up Temperature Sensor Performance.
Common causes
Common causes include Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning or damaged, Wiring Issues: Damaged or corroded wiring and connectors that affect the sensor's performance, ECM Software Glitch: A software issue within the ECM that misinterprets sensor data.
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 09, 2024
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Code P06AC 2017 GMC Sierra Description

The P06AC code indicates a malfunction related to the Control Module Power Up Temperature Sensor Performance in a 2017 GMC Sierra. This diagnostic trouble code (DTC) is triggered when the Engine Control Module (ECM) detects that the temperature sensor responsible for monitoring the power-up temperature of the control module is not performing within the expected parameters. The control module relies on accurate temperature readings to manage various engine functions, including fuel injection, ignition timing, and emissions control.

OBDII Code P06AC 2017 GMC Sierra - Control Module Power Up Temperature Sensor Performance
P06AC 2017 GMC Sierra Code - Control Module Power Up Temperature Sensor Performance

Common Causes of P06AC 2017 GMC Sierra

  1. Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning or damaged.
  2. Wiring Issues: Damaged or corroded wiring and connectors that affect the sensor's performance.
  3. ECM Software Glitch: A software issue within the ECM that misinterprets sensor data.
  4. Poor Electrical Connections: Loose or poor connections that disrupt the signal from the sensor to the ECM.
  5. Environmental Factors: Exposure to extreme temperatures or contaminants that affect sensor operation.

Symptoms of P06AC 2017 GMC Sierra

  1. Poor Engine Performance: Noticeable decrease in acceleration and overall power.
  2. Increased Fuel Consumption: Higher than normal fuel usage due to improper fuel mixture adjustments.
  3. Check Engine Light: The illumination of the check engine light on the dashboard.
  4. Engine Misfires: Occasional or frequent misfires that can lead to rough idling.
  5. Overheating: Potential overheating of the engine due to incorrect temperature readings.

How to Fix P06AC 2017 GMC Sierra

  1. Diagnostic Scan: Begin with a thorough diagnostic scan to confirm the P06AC code and check for any additional codes.
  2. Visual Inspection: Inspect the wiring and connectors associated with the temperature sensor for damage or corrosion.
  3. Sensor Replacement: If the temperature sensor is found to be faulty, replace it with a new, OEM-quality part.
  4. ECM Reprogramming: If a software glitch is suspected, reprogram or update the ECM software as necessary.
  5. Test Drive: After repairs, conduct a test drive to ensure that the issue is resolved and that no new codes appear.

Cost to Fix P06AC 2017 GMC Sierra

The cost to repair a P06AC code can vary significantly based on the specific diagnosis and the required repairs. On average, the total cost may range from $150 to $600. This estimate includes parts such as a new temperature sensor (typically $50 to $150) and labor costs, which can range from $80 to $150 per hour. The total labor time for diagnosing and repairing this issue may take between 1 to 3 hours, depending on the complexity of the problem. It is important to note that labor rates can vary widely based on location, vehicle make and model, and engine type. Metropolitan areas or dealerships may charge higher rates, while independent shops often offer more competitive pricing. For the most accurate estimate, it is advisable to check local repair shop rates.

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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.

Frequently Asked Questions about P06AC 2017 GMC Sierra Code

1. What does the OBDII code P06AC mean on a 2017 GMC Sierra?

P06AC indicates an issue with the Control Module Power Up Temperature Sensor Performance, meaning the sensor's readings are outside the expected range during startup.

2. What are the common symptoms of code P06AC on a GMC Sierra?

Symptoms include the check engine light turning on, poor engine performance, difficulty starting the vehicle, or erratic temperature readings.

3. What causes the P06AC code to appear?

Common causes include a faulty temperature sensor, wiring issues like damaged or corroded connectors, a malfunctioning control module, or software glitches.

4. Can I drive my 2017 GMC Sierra with the P06AC code active?

While the vehicle may still run, driving with this code active can lead to further engine performance issues or potential overheating risks. It’s best to address it promptly.

5. How do I diagnose the P06AC code on my GMC Sierra?

Start by scanning the vehicle with an OBDII scanner, inspecting the temperature sensor and related wiring for visible damage, and verifying the sensor’s voltage and resistance readings.

6. What repairs are typically needed for the P06AC code?

Repairs may involve replacing the faulty temperature sensor, repairing or replacing damaged wiring or connectors, or updating or reprogramming the vehicle’s control module.

7. How much does it cost to fix the P06AC code on a GMC Sierra?

Repair costs depend on the issue but can range from $100-$300 for a sensor replacement and more if control module repairs or reprogramming are needed.

8. Can a software update fix the P06AC code on a 2017 GMC Sierra?

Yes, if the issue stems from a software glitch in the powertrain control module, a software update may resolve it.

9. How can I prevent the P06AC code from reoccurring?

Regular maintenance, including inspecting sensors and wiring for damage, and keeping the vehicle’s software up to date, can help prevent this code from reoccurring.

10. Is the P06AC code specific to GMC Sierra trucks?

No, the P06AC code can appear on other GM vehicles using similar control systems, but the diagnostic and repair process may vary slightly.

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