AutoCodes – Dodge – P0651 Dodge

P0651 Dodge Code - 5 Volt Sensor Reference 2 Circuit

Quick Answer

The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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 Dodge indicates 5 Volt Sensor Reference 2 Circuit.
Common causes: Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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 4,269

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 May 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0651 Dodge Description

The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.

OBDII Code P0651 Dodge - 5 Volt Sensor Reference 2 Circuit - AutoCodes.com — P0651 Dodge Code - 5 Volt Sensor Reference 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P0651 Dodge?

Faulty Engine Control Module (ECM)
ECM harness is open or shorted
ECM circuit poor electrical connection
Shorted sensor on 5 volt circuit

How to Fix the DTC P0651 Dodge?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0651 Dodge 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.

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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 Dodge Code

1. What does OBDII code P0651 Dodge mean?

The code P0651 for Dodge indicates a problem with the 5 Volt Sensor Reference 2 Circuit.

2. What are the common symptoms of OBDII code P0651 in a Dodge vehicle?

Common symptoms include engine stalling, rough idling, poor acceleration, or even a no-start condition.

3. What causes the OBDII code P0651 to trigger in a Dodge vehicle?

The code P0651 can be triggered by issues such as a faulty 5-volt sensor, damaged wiring, or a problem with the Engine Control Module (ECM).

4. How do I diagnose the OBDII code P0651 in my Dodge vehicle?

Diagnosing this code involves checking the 5-volt reference circuit, inspecting sensor connections, and using a multimeter to test voltage levels.

5. Can I still drive my Dodge with the OBDII code P0651 present?

It is not recommended to drive your vehicle with the P0651 code active, as it can lead to further damage and potential safety hazards.

6. How can I repair the OBDII code P0651 in my Dodge on my own?

Repairing this code may involve replacing the faulty sensor, repairing damaged wiring, or resetting the ECM after addressing the underlying issue.

7. Do I need special tools to fix the OBDII code P0651 in my Dodge?

While basic tools like a multimeter and socket set may be sufficient for diagnosis, specialized tools may be needed for certain repairs, especially if dealing with the ECM.

8. Is it common for the OBDII code P0651 to recur in Dodge vehicles after repair?

If the underlying issue causing the P0651 code is not properly addressed during repair, there is a possibility that the code may reoccur.

9. Can a mechanic help me fix the OBDII code P0651 in my Dodge?

Yes, a qualified mechanic with experience in diagnosing and repairing OBDII codes can help you address the P0651 code in your Dodge effectively.

10. How much does it cost to repair the OBDII code P0651 in a Dodge at a repair shop?

The cost of repairing the P0651 code can vary depending on the extent of the issue, the needed parts, and labor rates at the repair shop. It's best to get a quote from a trusted mechanic.