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P0652 Chevrolet Code - 5 Volt Reference 2 Circuit Low Voltage

Quick Answer

The P0652 Chevrolet code indicates that the 5-volt reference circuit 2 is registering a low voltage. Common causes include Damaged wiring harness or connectors, Faulty ECM, Short circuit in the 5-volt reference 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 Chevrolet indicates 5 Volt Reference 2 Circuit Low Voltage.
Common causes
Common causes include Damaged wiring harness or connectors, Faulty ECM, Short circuit in the 5-volt reference 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 12, 2024
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Code P0652 Chevrolet Description

The P0652 Chevrolet code indicates that the 5-volt reference circuit 2 is registering a low voltage. In modern vehicles, the Engine Control Module (ECM) or Powertrain Control Module (PCM) sends out a 5-volt reference signal to various sensors and components throughout the vehicle. These sensors and components use the 5-volt reference signal as a point of reference for their operation. When the ECM detects that the voltage on the 5-volt reference circuit 2 is lower than expected, it triggers the P0652 code.

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

Common Causes of P0652 Chevrolet

  1. Damaged wiring harness or connectors
  2. Faulty ECM
  3. Short circuit in the 5-volt reference circuit
  4. Corrosion in electrical connections
  5. Electrical interference from other components

Symptoms of P0652 Chevrolet

  1. Engine misfires or rough idling
  2. Decreased fuel efficiency
  3. Engine stalling or hesitation
  4. Check Engine Light illuminated
  5. Inability to start the vehicle

How to Fix P0652 Chevrolet

  1. Use a diagnostic scanner to retrieve the P0652 code and confirm the issue.
  2. Inspect the wiring harness and connectors for any signs of damage or corrosion.
  3. Test the 5-volt reference circuit for short circuits or open circuits using a multimeter.
  4. Replace any damaged wiring harness, connectors, or the ECM if necessary.
  5. Clear the code and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0652 Chevrolet

The typical repair costs for addressing the P0652 Chevrolet code can range from $100 to $500, depending on the extent of the damage and the parts needed for replacement. This estimate includes parts and labor. However, it's essential to note that the specific 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's advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P0652 Chevrolet

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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Information for Specific Chevrolet 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 Chevrolet Code

1. What does the OBDII code P0652 mean for a Chevrolet?

P0652 indicates a low voltage issue in the 5-volt reference 2 circuit, which supplies power to various sensors in the vehicle.

2. What are the common symptoms of code P0652 in a Chevrolet?

Symptoms may include the check engine light turning on, poor engine performance, stalling, misfires, or issues with systems relying on sensor data.

3. What causes the P0652 code to appear in a Chevrolet?

Common causes include a short to ground, a faulty sensor connected to the 5-volt reference 2 circuit, damaged wiring, or a failing engine control module (ECM).

4. Which sensors might be affected by a P0652 code in a Chevrolet?

Sensors that may be affected include the throttle position sensor, manifold absolute pressure sensor, or fuel pressure sensor, among others.

5. How can I diagnose the P0652 code in my Chevrolet?

Start by checking for damaged or shorted wiring, inspecting the affected sensors for faults, and testing the 5-volt reference circuit with a multimeter.

6. Can I still drive my Chevrolet with a P0652 code?

Driving with this code is not recommended, as it can cause engine performance issues and potentially damage other components if not addressed.

7. How do I fix the P0652 code on my Chevrolet?

Repairs may include replacing damaged wiring, fixing shorts to ground, replacing a faulty sensor, or reprogramming or replacing the ECM if necessary.

8. How much does it cost to fix a P0652 code on a Chevrolet?

The repair cost varies depending on the cause, ranging from $50 for minor wiring repairs to $1,000+ if the ECM needs replacement.

9. Can a faulty ECM cause the P0652 code in a Chevrolet?

Yes, a faulty ECM can fail to maintain the proper 5-volt reference, triggering the P0652 code.

10. What tools are needed to troubleshoot the P0652 code in a Chevrolet?

You’ll typically need an OBDII scanner, a digital multimeter, and wiring diagrams specific to your Chevrolet model.

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