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Engine-Codes – GMC – P0652 2016 GMC Sierra

P0652 2016 GMC Sierra Code - 5 Volt Reference 2 Circuit Low Voltage

Quick Answer

The P0652 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a low voltage condition in the 5-volt reference circuit 2. Common causes include Faulty 5-volt reference circuit wiring, Failed 5-volt reference circuit sensor, Corrosion or poor connections in the circuit. 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
P0652 2016 GMC Sierra indicates 5 Volt Reference 2 Circuit Low Voltage.
Common causes
Common causes include Faulty 5-volt reference circuit wiring, Failed 5-volt reference circuit sensor, Corrosion or poor connections in the circuit.
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 P0652 2016 GMC Sierra Description

The P0652 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a low voltage condition in the 5-volt reference circuit 2. This circuit is responsible for providing a stable 5-volt reference signal to various sensors and components within the vehicle's engine management system. When the voltage in this circuit drops below the specified threshold, it can lead to erratic sensor readings, improper fuel delivery, and overall poor engine performance.

OBDII Code P0652 2016 GMC Sierra - 5 Volt Reference 2 Circuit Low Voltage
P0652 2016 GMC Sierra Code - 5 Volt Reference 2 Circuit Low Voltage

Common Causes of P0652 2016 GMC Sierra

  1. Faulty 5-volt reference circuit wiring
  2. Failed 5-volt reference circuit sensor
  3. Corrosion or poor connections in the circuit
  4. ECM malfunction
  5. Short circuit in the 5-volt reference circuit

Symptoms of P0652 2016 GMC Sierra

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

How to Fix P0652 2016 GMC Sierra

  1. Use a diagnostic scan tool to retrieve the trouble code and identify the specific sensor or component causing the issue.
  2. Inspect the wiring and connections in the 5-volt reference circuit for any signs of damage, corrosion, or poor connections.
  3. Test the 5-volt reference circuit sensor(s) for proper operation and replace any faulty sensors.
  4. Clear the trouble code from the ECM memory and perform a road test to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to pinpoint the exact cause of the low voltage condition.

Cost to Fix P0652 2016 GMC Sierra

The typical repair costs for addressing a P0652 code can vary depending on the specific cause of the issue. In general, replacing a faulty sensor or repairing wiring/connectors in the 5-volt reference circuit can range from $100 to $300, including parts and labor. However, the total cost may be higher if additional components need to be replaced or if more extensive diagnostics are required. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates can vary between different locations and types of repair facilities.

What does this mean?

Tech Notes for P0652 2016 GMC Sierra

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 2 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)



- Brake pedal position sensor

- Crankshaft 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.

Frequently Asked Questions about P0652 2016 GMC Sierra Code

1. What does the OBDII code P0652 mean on a 2016 GMC Sierra?

P0652 indicates a low voltage condition in the 5-volt reference 2 circuit, which provides power to various engine and transmission sensors.

2. What are the common symptoms of code P0652 in a 2016 GMC Sierra?

Symptoms may include poor engine performance, reduced power mode (limp mode), erratic transmission shifting, and illuminated check engine light.

3. What causes the P0652 code to trigger on a 2016 GMC Sierra?

The code is typically caused by a short to ground, a faulty sensor connected to the 5-volt reference 2 circuit, damaged wiring, or a malfunctioning engine control module (ECM).

4. Which sensors are affected by the 5-volt reference 2 circuit in a 2016 GMC Sierra?

The 5-volt reference 2 circuit may power sensors such as the throttle position sensor (TPS), manifold absolute pressure sensor (MAP), or fuel pressure sensor.

5. How do I diagnose the P0652 code on a 2016 GMC Sierra?

Begin by checking for damaged or shorted wiring in the 5-volt reference 2 circuit, testing affected sensors for faults, and using a multimeter to verify voltage levels.

6. Can a faulty sensor cause the P0652 code on a 2016 GMC Sierra?

Yes, a failing sensor connected to the 5-volt reference 2 circuit can create a short or pull the voltage down, triggering the code.

7. Is it safe to drive a 2016 GMC Sierra with a P0652 code?

Driving with this code is not recommended as it can lead to poor engine performance or limp mode, potentially causing further damage.

8. How do I fix the P0652 code on a 2016 GMC Sierra?

Repairs may include replacing a faulty sensor, repairing or replacing damaged wiring, or replacing the ECM if it’s found to be defective.

9. Can a dead battery cause the P0652 code on a 2016 GMC Sierra?

While unlikely, a weak or dead battery may cause voltage-related issues that could indirectly contribute to this code, so ensure the battery is in good condition.

10. Do I need special tools to repair the P0652 code on a 2016 GMC Sierra?

Basic tools like a multimeter for voltage testing, a scan tool for reading live data, and wiring diagrams are typically required for diagnosis and repair.

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