AutoCodes – Chrysler – P0651 Chrysler

P0651 Chrysler 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 Chrysler 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 5,964

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

What does this mean?

What are the Possible Causes of the DTC P0651 Chrysler?

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 Chrysler?

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 Chrysler 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 Chrysler code?

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

Need Help with the Code?

Get the P0651 Chrysler code diagnosed by a professional: Find a repair shop in your area

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 Chrysler Code

1. What are common symptoms of OBDII code P0651 in a Chrysler vehicle?

- Common symptoms include issues with engine performance, rough idling, poor fuel efficiency, and in some cases, the vehicle may go into limp mode.

2. What does the OBDII code P0651 Chrysler indicate?

- The code indicates a problem with the 5 Volt Sensor Reference 2 Circuit, specifically a voltage input signal that is out of range or not functioning properly.

3. What are possible causes of the P0651 code in a Chrysler vehicle?

- Possible causes include a faulty sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning Engine Control Module (ECM), or a power supply issue.

4. How can I diagnose the P0651 code in my Chrysler vehicle?

- To diagnose the issue, you can use a scan tool to check for the code, inspect the sensor and its wiring for any visible damage, and test the sensor's voltage output using a multimeter.

5. Can I continue driving my Chrysler with the P0651 code present?

- It is not recommended to continue driving with the P0651 code present, as it can lead to further engine damage or performance issues. It is best to address the issue promptly.

6. How do I repair the 5 Volt Sensor Reference 2 Circuit issue causing the P0651 code in my Chrysler?

- Repairing the issue may involve replacing the faulty sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ECM if necessary.

7. Is it possible to clear the P0651 code in my Chrysler without fixing the underlying issue?

- While you can clear the code using a scan tool, it is not advisable as the problem will likely reoccur if the root cause is not addressed.

8. How much does it typically cost to repair the P0651 code in a Chrysler vehicle?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from around $100 to $300 or more, including parts and labor.

9. Are there any preventive measures to avoid the P0651 code from appearing in my Chrysler?

- Regular maintenance checks, including inspecting the sensor circuit and connectors, can help prevent issues that may trigger the P0651 code.

10. Can a DIY enthusiast with basic automotive knowledge fix the P0651 code in a Chrysler?

- Depending on the specific cause, a DIY enthusiast with the necessary tools and knowledge may be able to address the P0651 code, but more complex issues may require professional assistance.