AutoCodes – Mercury – U1009 Mercury

U1009 Mercury Code - SCP Invalid Or Missing Data For Engine Torque

Quick Answer

This is a manufacturer-specific fault code and can be used for several different faults, depending upon what the manufacturer wants to use it for. Common causes include Faulty / intermittent ignition module, J1850 / SCP Bus wiring intermittently open, shorted to power or ground, Faulty / intermittent connection at the Powertrain Control Module (PCM). 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: U1009 Mercury indicates SCP Invalid Or Missing Data For Engine Torque.
Common causes: Common causes include Faulty / intermittent ignition module, J1850 / SCP Bus wiring intermittently open, shorted to power or ground, Faulty / intermittent connection at the Powertrain Control Module (PCM).
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 2,278

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 Apr 16, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1009 Mercury Description

This is a manufacturer-specific fault code and can be used for several different faults, depending upon what the manufacturer wants to use it for. The Powertrain Control Module (PCM) communicates over the Serial Communication Protocol (SCP) bus network or J1850 bus. This is a medium-speed bus communication system and is fault-tolerant, which means any type of intermittent/loose connection at these controllers will cause this code to set in memory, but will still operate, provided a data path is available. When the PCM is unable to communicate with any other controller at any time while the ignition switch is turned on, code U1009 will set. This is the typical reason for this code to set.

OBDII Code U1009 Mercury - SCP Invalid Or Missing Data For Engine Torque - AutoCodes.com — U1009 Mercury Code - SCP Invalid Or Missing Data For Engine Torque

What does this mean?

What are the Possible Causes of the DTC U1009 Mercury?

Faulty / intermittent ignition module
J1850 / SCP Bus wiring intermittently open, shorted to power or ground
Faulty / intermittent connection at the Powertrain Control Module (PCM)
Faulty EGR Sensor

How to Fix the DTC U1009 Mercury?

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

This is typically an electrical wiring connection issue, either at the engine controller or at the sensors being monitored by the manufacturer.
It can occur if:
The wrong EGR sensor is installed on the vehicle. Verify with the manufacturer for the latest.
A bad ignition module is present.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1009 Mercury 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 U1009 Mercury code?

Need more information on how to fix the U1009 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 U1009 Mercury Code

1. What are common symptoms of OBDII code U1009 in a Mercury vehicle?

- Common symptoms include engine misfires, rough idling, decreased fuel efficiency, and potential stalling.

2. What does the OBDII code U1009 in a Mercury indicate?

- The code U1009 indicates an SCP (Standard Corporate Protocol) communication error related to invalid or missing data for engine torque.

3. What are the possible causes of OBDII code U1009 in a Mercury?

- Possible causes include damaged wiring or connectors, faulty sensors or modules, communication network issues, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the OBDII code U1009 in my Mercury?

- Diagnose the code by checking the wiring and connectors for damage, testing relevant sensors and modules, verifying communication network integrity, and scanning for any other related trouble codes.

5. Can I drive my Mercury with the OBDII code U1009?

- It is not recommended to drive your Mercury with the U1009 code as it can lead to performance issues and potential further damage to the engine.

6. How can I repair the OBDII code U1009 in my Mercury?

- Repair steps may include repairing or replacing damaged wiring, connectors, sensors, or modules, resetting the ECM, and ensuring proper communication network functionality.

7. Will resetting the ECM clear the OBDII code U1009 in my Mercury?

- Resetting the ECM may temporarily clear the code, but if the underlying issue causing the U1009 code is not addressed, it is likely to reappear.

8. Can a DIY enthusiast fix the OBDII code U1009 in a Mercury?

- Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the U1009 code, but complex issues may require professional assistance.

9. Is it necessary to visit a mechanic for the OBDII code U1009 in my Mercury?

- If you are unsure about diagnosing or repairing the U1009 code, or if the issue is complex, it is recommended to visit a qualified mechanic for assistance.

10. How can I prevent the OBDII code U1009 from recurring in my Mercury?

- To prevent the U1009 code from recurring, regularly inspect and maintain the vehicle's wiring and connectors, address any communication network issues promptly, and follow proper diagnostic and repair procedures.