AutoCodes – Chevrolet – P0651 2014 Chevrolet Silverado

P0651 2014 Chevrolet Silverado Code - 5 Volt Reference 2 Circuit

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: P0651 2014 Chevrolet Silverado indicates 5 Volt Reference 2 Circuit.
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 976

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 P0651 2014 Chevrolet Silverado 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 P0651 2014 Chevrolet Silverado - 5 Volt Reference 2 Circuit - AutoCodes.com — P0651 2014 Chevrolet Silverado Code - 5 Volt Reference 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P0651 2014 Chevrolet Silverado?

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 P0651 2014 Chevrolet Silverado?

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 P0651 2014 Chevrolet Silverado 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.

Need more information about the P0651 2014 Chevrolet Silverado code?

Need more information on how to fix the P0651 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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.