AutoCodes – Chevrolet – P0651 2017 Chevrolet Silverado

P0651 2017 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 2017 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 473

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 2017 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 2017 Chevrolet Silverado - 5 Volt Reference 2 Circuit - AutoCodes.com — P0651 2017 Chevrolet Silverado Code - 5 Volt Reference 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P0651 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P0651 2017 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 2017 Chevrolet Silverado Code

1. What does OBDII code P0651 on a 2017 Chevrolet Silverado indicate?

The P0651 code for a 2017 Chevrolet Silverado specifically refers to a problem with the 5 Volt Reference 2 Circuit.

2. What are common symptoms of OBDII code P0651 on a 2017 Chevrolet Silverado?

Common symptoms of code P0651 may include engine stalling, rough idling, poor acceleration, and in some cases, the vehicle may not start at all.

3. What are possible causes of OBDII code P0651 on a 2017 Chevrolet Silverado?

Potential causes of the P0651 code can include a faulty 5 Volt Reference 2 circuit, damaged wiring or connectors, a defective Engine Control Module (ECM), or issues with the sensor associated with the circuit.

4. How serious is OBDII code P0651 on a 2017 Chevrolet Silverado?

Code P0651 should be addressed promptly as it can lead to drivability issues and potential safety concerns. It is recommended to diagnose and repair the issue as soon as possible.

5. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P0651?

It is not advisable to continue driving your vehicle with an unresolved P0651 code, as it can cause further damage and potentially leave you stranded. It is best to address the issue promptly.

6. How can I diagnose OBDII code P0651 on a 2017 Chevrolet Silverado?

Diagnosing the P0651 code typically involves using a diagnostic scanner to retrieve the specific details of the fault, inspecting the related wiring and connectors, and testing the 5 Volt Reference 2 circuit components.

7. Can I repair OBDII code P0651 on a 2017 Chevrolet Silverado myself?

While some experienced DIYers may be able to address the P0651 code themselves by checking and repairing wiring or connectors, complex issues with the ECM or sensor may require professional assistance.

8. What is the typical cost to repair OBDII code P0651 on a 2017 Chevrolet Silverado?

The cost of repairing the P0651 code can vary depending on the root cause of the issue. Simple fixes like repairing wiring may be relatively inexpensive, while replacing the ECM or sensor can be more costly.

9. Will resetting the OBDII code P0651 on a 2017 Chevrolet Silverado make it go away permanently?

Simply resetting the code without addressing the underlying issue will not resolve the problem permanently. The root cause of the P0651 code needs to be diagnosed and repaired to prevent it from recurring.

10. How long does it typically take to repair OBDII code P0651 on a 2017 Chevrolet Silverado?

The repair time for the P0651 code can vary depending on the specific cause of the issue and the complexity of the repair. Simple fixes may take a few hours, while more involved repairs could take longer.