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Engine-Codes – GMC – P0652 GMC

P0652 GMC Code - 5 Volt Reference 2 Circuit Low Voltage

Quick Answer

The P0652 GMC diagnostic trouble code (DTC) refers to a problem with the 5 Volt Reference 2 circuit in the vehicle. Common causes include Damaged wiring or connectors in the 5 Volt Reference 2 circuit, Faulty sensor or component drawing too much current, Malfunctioning ECM. 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 GMC indicates 5 Volt Reference 2 Circuit Low Voltage.
Common causes
Common causes include Damaged wiring or connectors in the 5 Volt Reference 2 circuit, Faulty sensor or component drawing too much current, Malfunctioning ECM.
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 11, 2024
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Code P0652 GMC Description

The P0652 GMC diagnostic trouble code (DTC) refers to a problem with the 5 Volt Reference 2 circuit in the vehicle. The 5 Volt Reference 2 circuit is a crucial component in the vehicle's electronic control system, as it provides a stable 5-volt reference voltage to various sensors and components throughout the vehicle. This code indicates that the voltage in this circuit is lower than the specified range, which can lead to a variety of issues with the vehicle's performance and operation.

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

Common Causes of P0652 GMC

  1. Damaged wiring or connectors in the 5 Volt Reference 2 circuit
  2. Faulty sensor or component drawing too much current
  3. Malfunctioning ECM
  4. Short circuit in the electrical system
  5. Corrosion or contamination in the circuit

Symptoms of P0652 GMC

  1. Engine misfires
  2. Rough idling
  3. Stalling
  4. Poor fuel efficiency
  5. Check engine light illuminated

How to Fix P0652 GMC

  1. Perform a visual inspection of the wiring and connectors in the 5 Volt Reference 2 circuit
  2. Test the sensors and components connected to the circuit for excessive current draw
  3. Check the ECM for proper voltage regulation
  4. Repair or replace any damaged wiring, connectors, sensors, or components as needed
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved

Cost to Fix P0652 GMC

The typical repair costs for addressing a P0652 GMC code can range from $100 to $300, depending on the specific cause of the issue and the extent of repairs needed. This estimate includes the cost of any necessary parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check with local auto repair shops for a more accurate estimate of the repair costs for this particular issue.

What does this mean?

Tech Notes for P0652 GMC

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

Need more information about the P0652 GMC code?

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Information for Specific GMC Models

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 GMC Code

1. What are common symptoms of OBDII code P0652 GMC?

The common symptoms of code P0652 include check engine light illumination, loss of communication with vehicle modules, and potential drivability issues.

2. What does the OBDII code P0652 GMC indicate?

Code P0652 indicates a low voltage condition in the 5 Volt Reference 2 Circuit, typically related to a malfunction in the sensor or its wiring.

3. What are possible causes of OBDII code P0652 GMC?

Possible causes of code P0652 include a faulty 5-volt reference circuit, damaged wiring or connectors, a defective sensor, or issues with the engine control module (ECM).

4. How can I diagnose OBDII code P0652 GMC?

Diagnosing code P0652 involves using a scan tool to retrieve the trouble code and then testing the 5-volt reference circuit, sensor, and related components for proper voltage, continuity, and resistance.

5. What are some tips for repairing OBDII code P0652 GMC?

Repair tips for code P0652 may include checking and repairing any damaged wiring or connectors, replacing the faulty sensor, ensuring proper grounding, and resetting the fault code after repairs are completed.

6. Can OBDII code P0652 GMC be fixed without professional help?

While some DIY enthusiasts may be able to diagnose and repair code P0652, it is recommended to seek professional help if you are not familiar with automotive electrical systems to avoid further damage or misdiagnosis.

7. Is it safe to continue driving with OBDII code P0652 GMC present?

It is generally not recommended to drive with code P0652 present, as it can lead to potential drivability issues and may cause further damage to the vehicle if left unaddressed.

8. How much does it typically cost to repair OBDII code P0652 GMC?

The cost of repairing code P0652 can vary depending on the underlying cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic.

9. Can a low voltage battery cause OBDII code P0652 GMC to trigger?

While a low voltage battery can potentially cause electrical issues in a vehicle, it is not a common cause of code P0652. It is recommended to check the specific components related to the 5-volt reference circuit for this fault code.

10. How long does it take to repair OBDII code P0652 GMC?

The time it takes to repair code P0652 can vary depending on the complexity of the issue, the availability of parts, and your level of experience with automotive repairs. In some cases, it can be resolved in a few hours, while more complex issues may take longer to diagnose and repair.

Discuss the causes and fixes for P0652 GMC OBDII Code

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  • I have a 2004 GMC Sierra 2500 HD with A p0652 code. No throttle response. Changed tpp sensor and it fixed it overnight. This morning same issue. Changed throttle pedal position sensor again and still nothing. Have ignition voltage

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