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P0651 2014 Chevrolet Silverado Code - 5 Volt Reference 2 Circuit

Quick Answer

The P0651 code on a 2014 Chevrolet Silverado indicates a problem with the 5-volt reference 2 circuit. Common causes include Faulty 5-volt reference circuit wiring, Failed 5-volt reference sensor, Corroded or loose electrical connections. 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
P0651 2014 Chevrolet Silverado indicates 5 Volt Reference 2 Circuit.
Common causes
Common causes include Faulty 5-volt reference circuit wiring, Failed 5-volt reference sensor, Corroded or loose electrical connections.
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 09, 2024
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Code P0651 2014 Chevrolet Silverado Description

The P0651 code on a 2014 Chevrolet Silverado indicates a problem with the 5-volt reference 2 circuit. In modern vehicles, the Engine Control Module (ECM) provides a 5-volt reference signal to various sensors and components throughout the vehicle. This signal is crucial for the proper operation of these sensors and components, as it allows them to accurately communicate with the ECM and perform their designated functions.

OBDII Code P0651 2014 Chevrolet Silverado - 5 Volt Reference 2 Circuit
P0651 2014 Chevrolet Silverado Code - 5 Volt Reference 2 Circuit

Common Causes of P0651 2014 Chevrolet Silverado

  1. Faulty 5-volt reference circuit wiring.
  2. Failed 5-volt reference sensor.
  3. Corroded or loose electrical connections.
  4. Issues with the Engine Control Module (ECM).
  5. Short circuit in the 5-volt reference circuit.

Symptoms of P0651 2014 Chevrolet Silverado

  1. Check Engine Light illuminated on the dashboard.
  2. Rough idling or stalling.
  3. Decreased fuel efficiency.
  4. Engine misfires.
  5. Hesitation or lack of power during acceleration.

How to Fix P0651 2014 Chevrolet Silverado

  1. Begin by using a diagnostic scanner to retrieve the trouble code and further diagnose the issue.
  2. Inspect the wiring and connections in the 5-volt reference 2 circuit for any signs of damage, corrosion, or loose connections.
  3. Test the 5-volt reference sensor to determine if it is functioning properly. Replace if necessary.
  4. Check the ECM for any faults or malfunctions. Repair or replace as needed.
  5. Clear the trouble code from the ECM's memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0651 2014 Chevrolet Silverado

The cost of repairing a P0651 code on a 2014 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the parts for this repair may range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total cost of repairing this issue could be anywhere from $150 to $500. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0651 2014 Chevrolet Silverado

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 P0651 2014 Chevrolet Silverado code?

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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 P0651 2014 Chevrolet Silverado Code

1. What does OBDII code P0651 on a 2014 Chevrolet Silverado mean?

The code P0651 indicates a problem with the 5 Volt Reference 2 Circuit in the vehicle's engine control module.

2. What are the common symptoms of OBDII code P0651 in a 2014 Chevrolet Silverado?

Common symptoms of code P0651 may include engine stalling, poor fuel economy, rough idling, and issues with acceleration.

3. What are the possible causes of OBDII code P0651 in a 2014 Chevrolet Silverado?

Potential causes of code P0651 can include a faulty engine control module, damaged wiring or connectors in the 5 Volt Reference 2 Circuit, or a short circuit within the system.

4. How can I diagnose OBDII code P0651 in my 2014 Chevrolet Silverado?

To diagnose code P0651, you may need to use a scan tool to retrieve the code, inspect the wiring and connectors in the 5 Volt Reference 2 Circuit, and perform voltage tests to pinpoint the issue.

5. How serious is OBDII code P0651 in a 2014 Chevrolet Silverado?

Code P0651 can cause drivability issues and potentially lead to further damage if left unresolved. It is recommended to address this code promptly to prevent any long-term problems.

6. Can I drive my 2014 Chevrolet Silverado with OBDII code P0651?

It is not advisable to continue driving your vehicle with code P0651 present, as it can affect the performance and reliability of your Chevrolet Silverado. It is best to address the issue as soon as possible.

7. How can I repair OBDII code P0651 in my 2014 Chevrolet Silverado?

Repairing code P0651 may involve replacing a faulty engine control module, repairing damaged wiring or connectors, or addressing any short circuits within the 5 Volt Reference 2 Circuit.

8. Will resetting the OBDII code P0651 in my 2014 Chevrolet Silverado make it go away?

Resetting the code may temporarily clear the Check Engine Light, but if the underlying issue causing code P0651 is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.

9. Can a DIY enthusiast fix OBDII code P0651 in a 2014 Chevrolet Silverado?

While some individuals with automotive repair experience may be able to address code P0651 themselves, diagnosing and repairing electrical issues can be complex. It may be best to consult a professional mechanic for accurate diagnosis and repair.

10. How much does it cost to fix OBDII code P0651 in a 2014 Chevrolet Silverado?

The cost to fix code P0651 can vary depending on the specific cause of the issue. It is recommended to obtain a diagnostic from a qualified mechanic to determine the exact repair costs for your 2014 Chevrolet Silverado.

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