AutoCodes – GMC – P0652 2016 GMC Sierra

P0652 2016 GMC Sierra Code - 5 Volt Reference 2 Circuit Low 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: P0652 2016 GMC Sierra indicates 5 Volt Reference 2 Circuit Low 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.

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Code Popularity 204

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
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Code P0652 2016 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 short to voltage or ground on any of the 5 Volt reference circuits for greater than 0.5 s.

OBDII Code P0652 2016 GMC Sierra - 5 Volt Reference 2 Circuit Low Voltage - AutoCodes.com — P0652 2016 GMC Sierra Code - 5 Volt Reference 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0652 2016 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 P0652 2016 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 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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0652 2016 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.

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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 itâ€™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.