AutoCodes – Chrysler – P0687 Chrysler

P0687 Chrysler Code - Engine Control Module Power Relay Control Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the power inputs. Common causes include Faulty Engine Control Module (ECM) power relay, ECM power relay harness is open or shorted, ECM power relay 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: P0687 Chrysler indicates Engine Control Module Power Relay Control Circuit High.
Common causes: Common causes include Faulty Engine Control Module (ECM) power relay, ECM power relay harness is open or shorted, ECM power relay 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 3,342

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 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0687 Chrysler Description

The Engine Control Module (ECM) monitors the power inputs. The ECM sets the OBDII code when the ECM detects a high power voltage input.

OBDII Code P0687 Chrysler - Engine Control Module Power Relay Control Circuit High - AutoCodes.com — P0687 Chrysler Code - Engine Control Module Power Relay Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0687 Chrysler?

Faulty Engine Control Module (ECM) power relay
ECM power relay harness is open or shorted
ECM power relay circuit poor electrical connection
Faulty ECM

How to Fix the DTC P0687 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 P0687 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 P0687 Chrysler code?

Need more information on how to fix the P0687 Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0687 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 P0687 Chrysler Code

What does the OBDII code P0687 mean on a Chrysler vehicle?

The P0687 code indicates a high voltage issue in the Engine Control Module (ECM) power relay control circuit, which can disrupt communication and functionality of the ECM.

What are common symptoms of the P0687 code?

Symptoms may include engine stalling, difficulty starting the vehicle, poor engine performance, and the Check Engine Light being illuminated.

What causes the P0687 code on a Chrysler?

Common causes include a faulty ECM power relay, damaged wiring or connectors in the power relay circuit, or issues with the ECM itself.

Can driving with the P0687 code damage my Chrysler vehicle?

Yes, driving with this code can lead to engine performance issues and potential damage to the ECM or other electrical components if unresolved.

How can I diagnose the P0687 code?

To diagnose, inspect the ECM power relay, check for damaged wiring or connectors in the relay circuit, and test voltage levels to ensure they are within the proper range.

How do I fix the P0687 code on my Chrysler?

Repairs may include replacing the ECM power relay, repairing or replacing damaged wiring and connectors, or replacing the ECM if necessary.

Can a weak battery cause the P0687 code?

Yes, a weak or failing battery can cause voltage irregularities that may trigger this code.

How much does it cost to repair the P0687 code?

Repair costs vary but typically range from $100–$300 for relay replacement or wiring repairs, while ECM replacement can cost significantly more.

Is the P0687 code specific to Chrysler vehicles?

No, the P0687 code can appear on various vehicles, but its diagnosis and repair may vary depending on the make and model.

Can a DIYer fix the P0687 code on a Chrysler?

Yes, if you're experienced with electrical diagnostics and repairs, you can attempt to fix the issue. However, complex ECM problems may require professional assistance.